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Why Snowflakes Have Six-Sided Symmetry
为什么雪花具有六边形对称结构
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Water molecules form hexagonal crystals when freezing in cold air.水分子在冷空气中结冰时形成六边形晶体。
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Hydrogen bonds arrange H₂O into a six-fold repeating pattern.氢键使水分子（H₂O）排列成六重重复图案。
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Every snowflake starts as a tiny ice crystal with six arms.每片雪花最初都是一颗微小的六臂冰晶。
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Air temperature and humidity change how each arm grows.空气温度和湿度影响每条臂的生长方式。
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No two snowflakes follow identical paths through the sky.没有两片雪花在天空中沿完全相同的路径飘落。
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That’s why their final shapes are nearly always unique.因此，它们最终的形状几乎总是独一无二的。
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Microscopes reveal stunning geometric details in each flake.显微镜下，每片雪花都展现出令人惊叹的几何细节。
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This symmetry comes from water’s molecular structure, not chance.这种对称性源于水的分子结构，而非偶然。