When melting snow crystals or raindrops fall through very cold air, they freeze to form small particles of ice, called sleet.
当融化的雪晶或雨滴落下时穿过非常冷的空气，它们会冰冻成很小的冰粒子，称作冰雨。
The ice particles in the clouds grow and combine to become so large that upward flowing air (updrafts) in the clouds can no longer support them, and they fall to the ground.
粒子在冰云和成长相结合，变得如此之大，向上流动在云中的空气上升气流可以不再支持他们，他们倒在地上。
The ice particles in the clouds grow and combine to become so large that upward flowing air (updrafts) in the clouds can no longer support them, and they fall to the ground.
粒子在冰云和成长相结合，变得如此之大，向上流动在云中的空气上升气流可以不再支持他们，他们倒在地上。
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