天气好的时候，白天与晚上的温差就会变大，遇到冷空气的水蒸气，就变为小水滴。
The difference in temperature of time of good weather, daytime and evening will become big, meeting the steam of cold air, change into small drop of water.
天气好的时候，白天与晚上的温差就会变大，遇到冷空气的水蒸气，就变为小水滴。
The difference in temperature of time of good weather, daytime and evening will become big, meeting the steam of cold air, change into small drop of water.
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