Air resistance then causes these crystals to lie nearly flat much of the time as they flutter to the ground.
而当它们飞舞着接近地面的时候，因为空气阻力的原因，它们会在空中水平漂浮很长时间。
As these crystals flutter to the ground, much time is spent with their faces flat, parallel to the ground.
这些冰晶缓缓地飘向地面，大多数时候是面向地面并与地面平行的。
The next time you see a butterfly flutter by, take a moment to notice the colors on its wings.
当你再次看到一只蝴蝶翩翩飞舞时，稍微留意一下它翅膀的颜色。
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