Like a liquid a gas has no shape, but unlike a liquid it will expand and fill any container it is put in.
气体和液体一样没有形状，但又不同于液体，因为气体会扩张并充满任何盛放它的容器。
The reason people say this is that unlike many minerals glass isn't formed into crystals but made up of its constituent molecules all jumbled together at random as they would be in a liquid.
人们这么指是因为玻璃和很多矿物质不同，它并不形成晶体，而是由构成分子随意混在一起组成，就像在液体中一样。
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