云由无数的水滴构成，这些水滴相互碰撞粘着从而形成雪晶。
Clouds are made of countless water droplets, and sometimes these droplets collide with and stick to snow crystals.
利用三维积层混合云人工增雨数值模式对人工增雨引晶催化后的各种微物理量变化及催化效应进行了模拟。
By means of three dimension cumulus mix cloud man-made numerical model, make a simulation to all kinds of micro physical amount change after man-made rainfall seeding and effect of seeding.
塔中地区石炭系碳酸盐岩主要岩类为颗粒灰（云）岩和泥粉晶白云岩。
The types of Carboniferous carbonate rocks in Tazhong area include grain limestone, grain dolomite and muddy to micritic dolomite.
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