雪花为什么都是六个角的?世界上有两片一样的雪花吗?
Why do snowflakes have six arms — are any two flakes identical?
雪花是小冰晶排队伍,水分子天生喜欢六边形队形,所以每片都长六个瓣。可下落途中温度湿度千变万化,长出的花纹各不相同——找两片完全一样的雪花,比找两片一样的树叶还难!
Snowflakes are tiny ice crystals, and water molecules love lining up in six-sided teams, so every flake grows six arms. Each falls through different temperatures and humidity, growing unique patterns — finding two identical flakes is harder than finding two identical leaves.
来源 · Source
《十万个为什么》第六版地球分册,少年儿童出版社,2013
Ten Thousand Whys: Earth 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