没有水，我们就不能生存，水以液体、气体或固体的形式存在。
Water, without which we cannot live, exists in the form of liquid, gas or solid.
由于压力差引起的气体或液体流称为滞流。
Flow of gas or liquid due to a pressure difference is called viscous flow.
所有物质，不论是气体，液体，或固体，都是由原子构成。
All matter, whether it be gas, liquid or solid, is made up of atoms.
所有物质，不论是气体，液体，或固体，都是由原子构成。
All matter, whether it be gas, liquid or solid, is made up of atoms.
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