为什么飞机能飞？
Why can airplanes fly?
机翼上表面气流快压强低，上下压差产生升力。
Faster flow above the wing lowers pressure, lifting the plane.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Anderson，《空气动力学基础》（第6版）
Anderson, 'Fundamentals of Aerodynamics' (6th ed.)
独立核验依据 · Independent verification: 核验依据 1 ISBN 9787516504413（豆瓣书目条目: 空气动力学基础）
#升力 #压强 #机翼
为什么救生衣能把人托在水上？
Why can a life jacket keep a person above water?
救生衣里塞着很轻的泡沫，比水轻很多。它把人往上托，让人头露出水面好呼吸。
A life jacket is stuffed with light foam that weighs far less than water. It pushes the person up so their head stays above the surface to breathe.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#救生衣 #浮力 #安全
为什么帆船没有发动机也能走？
Why can a sailboat move without an engine?
风鼓起大大的帆，推着船往前跑。舵手转舵让船朝着想去的方向走。
Wind fills the big sail and pushes the boat forward. The sailor turns the rudder to point the boat where they want to go.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#帆船 #风 #帆
为什么滑翔机没有发动机也能在空中滑很久？
Why can a glider stay in the air so long without an engine?
滑翔机有又长又宽的翅膀，向前滑时空气从翅膀上下流过产生升力。遇到往上吹的热气流，它会跟着盘旋上升，就能飞很久。
A glider has long wide wings; as it moves forward, air flowing over them creates lift. Catching rising warm air currents, it circles upward and can stay aloft for a long time.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#滑翔机 #升力 #气流
为什么潜水艇能沉下去又能浮起来？
Why can a submarine sink and float back up?
潜水艇肚子里有水舱，装满水就变重往下潜。把水排出去变轻，它就浮回水面。
A submarine has tanks in its belly. Fill them with water and it gets heavy and dives; pump the water out and it gets light and rises.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#潜水艇 #浮力 #水
为什么喷气发动机能把飞机往前推？
Why can a jet engine push a plane forward?
发动机把空气吸进去，和燃料一起烧成高温气体，再从后面猛地喷出。气体向后喷的力气，就把飞机向前推。
The engine sucks in air, burns it with fuel into hot gas, and blasts it out the back. The backward push of that gas drives the plane forward.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#喷气发动机 #气体 #推力
为什么气垫船能在水面上贴着飞？
Why can a hovercraft skim over water?
气垫船向下吹出一大层空气，在船底和地面之间造出气垫。船浮在空气上，所以贴着水面飞却不沉。
A hovercraft blows a thick layer of air downward, making a cushion between its base and the ground. Riding on air, it skims over water without sinking.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#气垫船 #空气 #浮力
为什么安全带能保护我们？
Why do seat belts protect us?
车突然停下时，人还会往前冲。安全带把人牢牢拉住，不让人撞到前面，就少受伤。
When a car stops suddenly, your body still wants to keep moving forward. The belt holds you back so you don't slam into the front and get hurt.
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
《十万个为什么》第六版建筑与交通分册,少年儿童出版社,2013
Ten Thousand Whys: Architecture and Transportation 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
#安全带 #安全 #车
为什么船底要做成弯弯的形状？
Why is a boat's bottom shaped curved?
弯弯的船底把水轻轻分到两边，减少阻挡让船跑得更快。它也让船在水里更稳，不容易侧翻。
A curved hull slices water to the sides, cutting drag so the boat moves faster. The shape also keeps the boat steady and less likely to tip.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#船底 #阻力 #平稳
为什么船能浮在水面上？
Why can boats float on water?
船的身体很宽很轻，把水往旁边推开。推开的水会用力把船托起来，所以船不会沉下去。
A boat is wide and light, pushing water out to the sides. The pushed-aside water pushes back up, holding the boat up so it does not sink.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#浮力 #船 #水
为什么飞机飞很高时机舱里还能正常呼吸？
Why can you still breathe normally in a plane flying very high?
高空气压很低、氧气也少，所以飞机把机舱密封起来往里打气。舱内保持像地面一样的气压，人就不会觉得难受。
High altitude has low pressure and little oxygen, so the plane seals its cabin and pumps in air. Keeping cabin pressure like ground level lets passengers breathe comfortably.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#飞机 #气压 #机舱
为什么汽车轮胎上有花纹？
Why do car tires have grooves?
轮胎上的花纹能咬住地面，让车不容易打滑。下雨时花纹还能把水排开，车就不会漂在水上。
The grooves grip the road so the car does not slip easily. In rain they also push water away, stopping the car from sliding on a film of water.
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
《十万个为什么》第六版建筑与交通分册,少年儿童出版社,2013
Ten Thousand Whys: Architecture and Transportation 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
#轮胎 #花纹 #安全
为什么有些船开快了会整个离开水面？
Why do some boats rise completely above the water when fast?
这种船底下有像小翅膀的水翼，速度越快水流过水翼产生的升力越大。升力把船身托离水面，阻力变小就跑得飞快。
These boats have wing-like foils underneath; the faster they go, the more lift the flowing water creates. The lift raises the hull out of the water, cutting drag so they speed along.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988;中译《万物运转的秘密》
D. Macaulay, The Way Things Work, Houghton Mifflin, 1988; Chinese ed.
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#水翼船 #水翼 #升力
为什么热气球会飞上天？
Why does a hot-air balloon fly up?
气球里的空气被烧热后变轻了。轻的空气往上飘，就把气球和篮子一起带上了天。
The air inside the balloon is heated and becomes lighter. Light warm air floats upward, lifting the balloon and its basket into the sky.
难度 入门 · 适合 幼儿(3-6)
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
#热气球 #空气 #浮力
为什么降落伞落得那么慢？
Why does a parachute fall so slowly?
降落伞张开像一把大伞，兜住很多空气。空气托着它，让人慢慢、安全地落到地上。
A parachute opens like a big umbrella and catches lots of air. The air holds it up, so the person floats down slowly and safely.
难度 入门 · 适合 幼儿(3-6)
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
#降落伞 #空气 #安全