为什么手机信号满格却上不了网，可能遇到了伪基站？
Why might you have full signal but no internet—could it be a fake base station?
伪基站会假装成运营商信号把你的手机“吸”过去，拦截短信、伪造来电或发诈骗信息。信号满却收不到正常短信、频繁掉线时要警惕，尽量少用手机并离开该区域。
A fake base station impersonates a carrier to hijack your phone, intercepting SMS or sending fraud. If you have bars but miss normal texts and drop often, be wary and move away.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
《十万个为什么》第六版电子与信息分册,少年儿童出版社,2013
Ten Thousand Whys: Electronics and Information volume, 6th ed., Juvenile and Children Publishing House, 2013
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-7-5324-9328-9 · 核验依据 2 ISBN 9787532493289
#伪基站 #信号 #诈骗
什么是 NFC，为什么手机碰一下就能付款？
What is NFC, and why can phones pay by tapping?
NFC 是极短距离（几厘米）的无线技术。手机和收银机轻轻一碰就交换付款信息，比扫码更快，但需要双方都支持 NFC。
NFC is a very short-range (a few cm) wireless tech. Tap phone to terminal and they swap payment info—faster than scanning, but both sides must support NFC.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
《十万个为什么》第六版电子与信息分册,少年儿童出版社,2013
Ten Thousand Whys: Electronics and Information volume, 6th ed., Juvenile and Children Publishing House, 2013
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-7-5324-9328-9 · 核验依据 2 ISBN 9787532493289
#NFC #近场 #支付
量子比特和经典比特有什么本质不同？
What is fundamentally different about a qubit versus a classical bit?
经典比特只有 0 或 1 两个确定状态；量子比特是量子态，可以处于 |0⟩ 和 |1⟩ 的叠加，测量时才以一定概率坍缩为其中之一。多个量子比特还可纠缠，使整体状态空间指数增长。正是这些性质让量子算法在某些问题上有独特优势——但也意味着结果本质是概率性的，需要反复测量和纠错，量子计算机并非在一切任务上都更快。
A classical bit is deterministically 0 or 1; a qubit is a quantum state in a superposition of |0⟩ and |1⟩, collapsing to one outcome with some probability only upon measurement. Qubits can also become entangled, making the joint state space grow exponentially. These properties give quantum algorithms unique advantages on certain problems—but results are inherently probabilistic, needing repeated measurement and error correction, and quantum computers are not faster at everything.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
Feynman《量子力学计算机》(1982)；Nielsen 与 Chuang《量子计算与量子信息》
Feynman, 'Simulating physics with computers' (1982); Nielsen & Chuang, 'Quantum Computation and Quantum Information'
独立核验依据 · Independent verification: 核验依据 1 ISBN 9780521635035 (2016)
#量子比特 #叠加 #纠缠
公共场合连免费 WiFi 有什么风险？
What are the risks of using free public WiFi?
公共 WiFi 可能被人偷看你在网上发了什么，尤其是没加密的。尽量不要在公共 WiFi 上登录银行、输密码；要用就开流量或 VPN。
On public WiFi, others may snoop on what you send, especially on unencrypted networks. Avoid banking or entering passwords there; use mobile data or a VPN.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Kurose & Ross,《Computer Networking: A Top-Down Approach》第8版,Pearson,2021
J. F. Kurose and K. W. Ross, Computer Networking, 8th ed., Pearson, 2021
#公共WiFi #安全 #偷看
物联网（IoT）是什么？智能家居怎么工作？
What is the Internet of Things (IoT), and how do smart homes work?
物联网是把传感器、家电、设备接入互联网，让它们采集数据、接受远程控制。智能家居里，传感器（温度、人体感应）和开关通过 Wi-Fi、蓝牙、ZigBee 连到网关或云平台，你的指令和自动化规则（“湿度低就开加湿器”）在那里被解释执行。好处是自动化，风险是每个设备都可能是网络攻击面。
The IoT connects sensors, appliances, and gadgets to the internet so they collect data and accept remote control. In a smart home, sensors (temperature, motion) and switches link via Wi-Fi, Bluetooth, or ZigBee to a hub or cloud where your commands and automation rules (“if humidity drops, turn on the humidifier”) are interpreted and executed. The upside is automation; the risk is every device becomes an attack surface.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#物联网 #智能家居 #传感器
为什么有的界面好用、有的难用？“可用性”指什么？
Why are some interfaces easy to use and others not? What is usability?
可用性衡量一个产品对目标用户是否有效、高效、满意地完成任务。好界面遵循学习成本低、可记忆、容错、可恢复等原则，比如一致的操作、清晰的反馈、把常用操作放大。它背后是人机交互（HCI）研究，连按钮大小都有规律——费茨定律说明目标越大越近，点击越快越准。
Usability measures how effectively, efficiently, and satisfactorily a product lets target users finish tasks. Good interfaces follow principles like low learning cost, memorability, error tolerance, and recovery—consistent actions, clear feedback, and prominent placement of frequent operations. Behind it lies human-computer interaction (HCI) research, down to the physics of buttons: Fitts's law shows larger, closer targets are clicked faster and more accurately.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
Fitts P M., The Information Capacity of the Human Motor System in Controlling the Amplitude of Movement, Journal of Experimental Psychology, 1954
Fitts P M., The Information Capacity of the Human Motor System in Controlling the Amplitude of Movement, Journal of Experimental Psychology, 1954
独立核验依据 · Independent verification: 核验依据 1 DOI 10.1037/h0055392
#可用性 #人机交互 #费茨定律
什么是飞行模式？
What is airplane mode?
飞行模式会一次性关掉手机的所有无线信号（电话、流量、WiFi、蓝牙），让它在飞机上不会干扰设备，也能省电、快速充电。
Airplane mode switches off all wireless signals at once—calls, data, WiFi, Bluetooth—so the phone won't interfere on a plane, and it also saves battery or charges faster.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#飞行模式 #信号 #省电
什么是屏幕分辨率？
What is screen resolution?
分辨率是屏幕上横竖各有多少个小亮点（像素）。同样大小，像素越多画面越细腻清楚，比如 1920×1080 比 1280×720 更清晰。
Resolution is how many tiny dots (pixels) a screen has across and down. More pixels in the same size means sharper images—1920×1080 is clearer than 1280×720.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Charles Petzold,《Code: The Hidden Language of Computer Hardware and Software》第2版,Microsoft Press,2022
C. Petzold, Code, 2nd ed., Microsoft Press, 2022; Chinese ed.《编码》
#分辨率 #像素 #屏幕
脑机接口（BCI）是怎么把"想法"变成机器指令的？
How does a brain-computer interface (BCI) turn "thoughts" into machine commands?
BCI 用电极采集脑电信号（头皮 EEG 或皮层电极），经预处理去噪、提取特征（如运动想象时 mu 节律的变化），再用分类器或解码器把特征模式映射为光标移动、字符拼写或机械臂动作等指令，最后通过视觉或触觉反馈让用户学会调节脑信号，形成闭环。
BCIs acquire brain signals with electrodes (scalp EEG or cortical arrays), preprocess and denoise them, extract features such as mu-rhythm changes during motor imagery, then map the feature patterns to commands like cursor movement, character spelling or robotic-arm actions via classifiers or decoders. Visual or tactile feedback closes the loop so users learn to modulate their signals.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Nature（Nicolelis 等, 灵长类皮层神经元集群对手部轨迹的实时预测, Nature, 2001）
Nature (Nicolelis et al., Real-time prediction of hand trajectory by ensembles of cortical neurons in primates, Nature 409, 2001)
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1038/35042582：Real-time prediction of han
#脑机接口 #EEG #人机交互
云计算的“虚拟化”是什么？一台服务器怎么变成很多台？
What is virtualization in cloud computing, and how does one server become many?
虚拟化用虚拟机监控程序（hypervisor）把一台物理机的 CPU、内存、磁盘切成多个相互隔离的虚拟机，每个虚拟机像独立电脑，可装自己的操作系统。云厂商靠它把硬件资源池化、动态分配给客户，随开随关。容器（如 Docker）是更轻的替代，共享宿主内核，只隔离应用环境。
Virtualization uses a hypervisor to carve one physical machine's CPU, memory, and disk into isolated virtual machines, each behaving like its own computer with its own OS. Cloud providers pool hardware this way and allocate it to customers on demand, creating and deleting VMs freely. Containers (like Docker) are a lighter alternative that share the host kernel and isolate only the application environment.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Tanenbaum & Bos,《Modern Operating Systems》第4版,Pearson,2014
A. S. Tanenbaum and H. Bos, Modern Operating Systems, 4th ed., Pearson, 2014
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL1970688W：Modern Operating System
#虚拟化 #虚拟机 #容器
扫码付款时要注意什么才安全？
What should you watch for to scan-pay safely?
先核对收款方名称和金额，别扫来历不明的码，尤其是贴在正规二维码上面的“覆盖码”。付款前确认屏幕显示的商户，付完留好记录。
Check the payee name and amount first; don't scan unknown codes, especially stickers placed over a real one. Confirm the merchant on screen and keep the receipt.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#扫码 #支付 #防骗
指纹解锁和人脸解锁哪个更安全？
Which is safer: fingerprint or face unlock?
一般来说指纹更难被照片或录像骗过，人脸可能被高清照片或面具破解（要看具体技术）。两者都比密码方便，但重要账户建议再加密码或两步验证。
Fingerprints are usually harder to fool with a photo than face unlock, which some systems can be tricked by a mask or picture. Both are convenient; add a password or 2FA for important accounts.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#指纹 #人脸 #生物识别
2.4G 和 5G 的 WiFi 有什么不一样？
What is the difference between 2.4GHz and 5GHz WiFi?
2.4G 穿墙远、速度慢；5G 速度快、但隔一堵墙信号就弱。打游戏、看高清视频靠近路由器时用 5G，隔着好几间房用 2.4G 更稳。
2.4GHz reaches farther through walls but is slower; 5GHz is faster but weak past one wall. Use 5GHz near the router for HD video, 2.4GHz across rooms.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Kurose & Ross,《Computer Networking: A Top-Down Approach》第8版,Pearson,2021
J. F. Kurose and K. W. Ross, Computer Networking, 8th ed., Pearson, 2021
#WiFi #频段 #信号
快充会伤电池吗？
Does fast charging damage the battery?
快充会放热，而高温才是电池老化的主因。正规手机的快充有温控和限流保护，偶尔用没关系；长期边快充边打游戏、让手机很烫，才更伤电池。
Fast charging makes heat, and heat—not speed—is what ages batteries. Certified fast chargers limit current and temperature, so occasional use is fine; sustained heat while gaming is what harms it.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#快充 #电池 #发热
手机发烫正常吗，太烫了怎么办？
Is it normal for a phone to get hot, and what if it's too hot?
打游戏、充电视频会发热，轻微温热正常。但若烫手，就停下重活、摘掉厚壳、别边充边玩，放到阴凉处。长期过热会伤电池。
Gaming or charging while using the phone warms it; mild warmth is normal. If it's too hot to hold, pause heavy use, remove a thick case, and let it cool. Sustained heat hurts the battery.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#发热 #手机 #电池
AR 和 VR 有什么区别？
What is the difference between AR and VR?
VR（虚拟现实）用头显完全取代你看到的现实，把你放进生成的虚拟世界，头部追踪让画面随视角变化；AR（增强现实）则在真实画面上叠加数字信息，比如手机地图的路标、试戴眼镜的效果。技术上 AR 需要实时感知环境（SLAM 定位），VR 更需要高刷新率、低延迟来防晕动。
VR (virtual reality) replaces your view of the real world entirely, placing you inside a generated environment where head tracking changes the scene with your gaze; AR (augmented reality) overlays digital information on top of the real world, like map arrows or virtual eyeglasses on your phone. Technically AR needs real-time environment perception (SLAM), while VR demands high refresh rates and low latency to prevent motion sickness.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#VR #AR #增强现实
游戏和电影里的"物理引擎"是怎样让物体看起来真实运动的？
How do physics engines in games and movies make objects move realistically?
物理引擎按固定时间步循环做两件事：用牛顿运动定律积分更新物体的位置与速度（重力、弹力、碰撞产生的冲量），再用碰撞检测找出并纠正重叠。为了性能，游戏常用简化的碰撞体（球体、盒体），限定步长并采用宽相位/窄相位两级检测，让上千个物体也能实时模拟。
Physics engines loop at fixed time steps doing two jobs: integrating position and velocity from Newton's laws (gravity, spring forces, collision impulses), and collision detection that finds and resolves overlaps. For performance, games use simplified collision shapes such as spheres and boxes, fixed timesteps, and broad-phase/narrow-phase detection so thousands of bodies simulate in real time.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
《计算机图形学原理及实践》（Foley 等）
Computer Graphics: Principles and Practice (Foley et al.)
独立核验依据 · Independent verification: 核验依据 1 ISBN 9780201121100 (1990)
#物理引擎 #碰撞检测 #动画
手机收到的验证码是干什么用的？
What is the verification code your phone receives for?
验证码是用来确认“真的是你本人在操作”。网站给你手机发一串数字，只有你填对了，才让你登录或改密码。
A verification code confirms it's really you. The site sends digits to your phone; only by entering them can you log in or reset a password.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-11-06
来源 · Source
NIST SP 800-63B
NIST SP 800-63B
独立核验依据 · Independent verification: 核验依据 1 NIST SP 800-63B · DOI 10.6028/NIST.SP.800-63b
#验证码 #登录 #身份
手机充电到 100% 要马上拔掉吗？
Should you unplug your phone the moment it hits 100%?
现代手机充满后会自动停止充电，不必立刻拔。但长期让电池一直满电或一直高温，会稍微加快老化。平时随用随充、别经常用到 0% 最护电池。
Modern phones stop charging at 100%, so you don't need to unplug instantly. But keeping a battery full and hot for long slightly speeds aging. Top up often and avoid draining to 0%.
难度 入门 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#手机 #电池 #充电
手机拍夜景为什么要举着几秒不动，拍出来还比眼睛看到的更亮？
Why must you hold a phone still for several seconds in night mode, and why is the photo brighter than the scene looked?
手机传感器很小，单张长曝光会因手抖而模糊，所以夜景模式改为连拍十几张较短曝光的照片，再逐张对齐叠加。多帧平均能把随机噪声降低约帧数的平方根倍，等效于一次长曝光却避开了运动模糊，举着不动是为了让对齐算法有稳定的参考。随后的色调映射会大幅提亮暗部并压缩高光，因此成片比肉眼观感更亮、细节更多，而拍摄期间移动的人容易出现重影。
A phone sensor is tiny, and a single long exposure would blur from hand shake, so night mode captures a burst of a dozen or more short frames and aligns and merges them. Averaging N frames cuts random noise by roughly the square root of N, giving the light-gathering of a long exposure without motion blur, and holding still gives the alignment stage something stable to work with. Tone mapping then lifts the shadows and compresses highlights, which is why the result looks brighter and more detailed than the scene did, and why anyone who moved during the burst comes out ghosted.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Hasinoff 等《Burst Photography for High Dynamic Range and Low-Light Imaging on Mobile Cameras》(ACM Transactions on Graphics, SIGGRAPH Asia 2016)
Hasinoff et al., "Burst Photography for High Dynamic Range and Low-Light Imaging on Mobile Cameras," ACM Transactions on Graphics (SIGGRAPH Asia 2016)
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1145/2980179.2980254：Burst photography fo
#夜景模式 #多帧合成 #降噪 #色调映射
为什么手指一点屏幕就有反应，戴着厚手套点却没用？
Why does a screen respond to a bare fingertip but ignore a thick glove?
手机屏幕下面有一层看不见的细网格，一直在测量每个交叉点上能存住多少电。手指里有带盐的水，能导电，靠近时会把一点电引走，网格发现哪个点变了，就知道你点在哪里。厚手套是绝缘的，把手指挡得太远，网格察觉不到变化，所以没反应；触屏手套的指尖织进了导电的丝线，于是又能用了。
Under the glass there is an invisible grid that constantly measures how much electric charge each crossing point can hold. A fingertip contains salty water and conducts, so bringing it close pulls a little charge away, and the grid notices which point changed and reports where you touched. A thick glove is an insulator that keeps your finger too far away for the grid to sense any change, so nothing happens — touchscreen gloves work again because conductive thread is woven into their fingertips.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Barrett, Omote,《Projected‐Capacitive Touch Technology》,Information Display,2010 (DOI: 10.1002/j.2637-496x.2010.tb00229.x)
Barrett, Omote, 'Projected‐Capacitive Touch Technology', Information Display, 2010, DOI: 10.1002/j.2637-496x.2010.tb00229.x
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1002/j.2637-496x.2010.tb00229.x
#触摸屏 #电容感应 #导电 #绝缘
视频通话为什么是画面卡顿、声音断续，而不是像慢放一样整体变慢？
Why does a video call stutter and clip audio instead of simply playing back in slow motion?
实时通话必须按时播出，晚到的数据就失去价值了。接收端只维持一个几十到几百毫秒的抖动缓冲，用来吸收网络延迟波动；一旦某个包迟到或丢失超过这个窗口，播放器就直接跳过它，于是出现画面停顿、马赛克或声音断裂。相反，看点播视频可以提前缓冲几十秒，所以宁可转圈等待也能保证连续播放——这正是实时通信与流媒体的根本取舍。
A live call must play out on schedule, and data arriving late is worthless. The receiver keeps only a jitter buffer of tens to a few hundred milliseconds to absorb variation in network delay, and anything later than that window is skipped outright, which appears as a frozen frame, blockiness or a clipped syllable. On-demand video, by contrast, buffers many seconds ahead, so it shows a loading spinner instead of glitching — the fundamental trade-off between real-time communication and streaming.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
RFC 3550《RTP: A Transport Protocol for Real-Time Applications》；ITU-T 建议 G.114（单向传输时延）
RFC 3550, "RTP: A Transport Protocol for Real-Time Applications"; ITU-T Recommendation G.114 on one-way transmission time
独立核验依据 · Independent verification: 核验依据 1 ARCHIVE 标识 rfc1889：RFC1889: RTP: A Transport Protocol fo
#抖动缓冲 #实时通信 #丢包 #RTP
二维码是什么，扫一下为什么能打开网页或付钱？
What is a QR code, and why does scanning it open a page or pay?
二维码是用黑白小方块把网址、文字等编成图案。手机扫它就把图案翻译回信息，于是打开了链接或跳到付款页。
A QR code encodes info like a web link into black-and-white squares. Your phone reads the pattern and turns it back into text, opening a link or payment page.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Charles Petzold,《Code: The Hidden Language of Computer Hardware and Software》第2版,Microsoft Press,2022
C. Petzold, Code, 2nd ed., Microsoft Press, 2022; Chinese ed.《编码》
#二维码 #扫码 #编码
为什么手机玩着玩着就没电了？
Why does a phone run out of battery while you play with it?
手机靠里面的电池存电，屏幕、声音、上网都在花电。用得越久、越亮、联网越多，电就用得越快，最后就没了。
The phone stores power in its battery, and the screen, sound and internet all spend it. The more you use it, the brighter it is, the faster the battery empties.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#电池 #手机 #用电
电脑和手机有什么不一样？
How is a computer different from a phone?
电脑屏幕大、能开很多窗口一起干活，还能接键盘鼠标；手机小、能随身带、用手指点。它们都能上网、看视频，只是样子和用法不同。
A computer has a big screen and runs many windows with a keyboard; a phone is small, pocketable and tapped by finger. Both surf the web and play video, just used differently.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Charles Petzold,《Code: The Hidden Language of Computer Hardware and Software》第2版,Microsoft Press,2022
C. Petzold, Code, 2nd ed., Microsoft Press, 2022; Chinese ed.《编码》
#电脑 #手机 #设备
蓝牙是什么，平时用来干嘛？
What is Bluetooth and what is it used for?
蓝牙是用很短距离的无线电把两个设备连起来，比如手机连耳机、手表连手机。它很省电，但只能在几米内用。
Bluetooth links two devices over a very short radio range—like phone to earbuds, or watch to phone. It saves power but only works within a few meters.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
Charles Petzold & David Sullivan,《Code: The Hidden Language of Computer Hardware and Software》第2版,No Starch Press,2022
C. Petzold & D. Sullivan, Code: The Hidden Language of Computer Hardware and Software, 2nd ed., No Starch Press, 2022
独立核验依据 · Independent verification: 核验依据 2 ARCHIVE 标识 codehiddenlangua0000petz：Code : the hidden la
#蓝牙 #耳机 #连接
手机拍照时咔嚓一声,照片存到哪去了?
Where does my photo go when the phone goes click?
镜头把光变成电信号,芯片把它翻译成几百万个小色点(像素),按顺序存进手机的存储芯片里——那是一小块能记住电信号的神奇材料。存储芯片断电也不忘事,所以相册里的照片一直都在,还能复制发给奶奶。
The lens turns light into electric signals; a chip translates them into millions of tiny colored dots called pixels, stored in a memory chip — a magic material that remembers even when powered off. That is why photos stay in albums and can be copied to Grandma.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
韩启德总主编《十万个为什么》(第六版),少年儿童出版社,2013
Han Qide chief ed., Ten Thousand Whys, 6th edition, Juvenile and Children Publishing House, 2013, 6th ed., Juvenile and Children Publishing House, 2013
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-7-5324-9328-9 · 核验依据 2 ISBN 9787532493289
#像素 #存储芯片 #数码照片
手机导航怎么知道路上堵车了?它偷看了所有人的位置吗?
How does navigation know traffic is jammed — is it spying on everyone?
导航App把数百万部开启定位的手机变成流动传感器:匿名汇总各路段的车速,慢下来就是拥堵信号,再结合路况报告生成红色路段。你的数据经过匿名化处理,且可关闭贡献选项。这展示了众包的威力——每个人贡献一小部分,合成一幅实时全景地图。
Navigation apps turn millions of location-enabled phones into moving sensors: anonymized speeds along roads reveal slowdowns, colored red on your map combined with reports. Data gets anonymized and you can opt out of contributing. Crowdsourcing power at work — everyone contributes a little to paint a live citywide picture.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
韩启德总主编《十万个为什么》(第六版),少年儿童出版社,2013
Han Qide chief ed., Ten Thousand Whys, 6th edition, Juvenile and Children Publishing House, 2013, 6th ed., Juvenile and Children Publishing House, 2013
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-7-5324-9328-9 · 核验依据 2 ISBN 9787532493289
#众包 #实时路况 #隐私保护
什么是充电宝（移动电源）？
What is a power bank (mobile battery)?
充电宝是一个自带电池的小盒子，能帮手机在外面补电。出门前充满它，手机没电时插上就能继续用。
A power bank is a small box with its own battery that recharges your phone on the go. Charge it at home, then plug in your phone when it's low.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Wu, Moo, Hou，《A Battery Power Bank with Series-Connected Buck–Boost-Type Battery Power Modules》,Energies,2017 (DOI: 10.3390/en10050650)
Wu, Moo, Hou, 'A Battery Power Bank with Series-Connected Buck–Boost-Type Battery Power Modules', Energies, 2017, DOI: 10.3390/en10050650
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.3390/en10050650
#充电宝 #电池 #便携
什么是 WiFi？
What is WiFi?
WiFi 是用无线电波代替网线，把手机电脑连到路由器和互联网的方式。路由器像个小广播站，把网络信号发到家里各个角落。
WiFi is a way to connect phones and laptops to the internet without cables, using radio waves. The router acts like a small broadcast tower sending signal around your home.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Charles Petzold,《Code: The Hidden Language of Computer Hardware and Software》第2版,Microsoft Press,2022
C. Petzold, Code, 2nd ed., Microsoft Press, 2022; Chinese ed.《编码》
#WiFi #无线 #上网