我们都知道:在傍晚因为气温的降低，空气中的的水汽因为放热冷凝成水珠，附着在植物叶片上,当越来越多的水汽凝结后就会集中流淌至叶尖，形成露珠。这是一个常见的物理现象。同时由于是空气的水汽凝结，露珠其实并不纯 ...
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