水可以从液体变成固体。

Water can be changed from a liquid intos solid.

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固体在一定温度下转变成液体。

Solids turn to liquids at certain temperatures.

《柯林斯英汉双解大词典》

不需要蒸汽时，液体保持在熔点以上，需要蒸汽时液体才能变成固体，释放其储存的能量。

The liquid is maintained above its melting point until steam is required, at which point the liquid is allowed to turn back into a solid, releasing its stored energy.

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Maybe you're not looking at a reaction, but you've got some new compound, and you're looking at it go from liquid to solid or to gas.

也许你研究的不是一个反应,但你得到了一种新的化合物,你看着它从液体变成了固体或气体。

麻省理工公开课 - 热力学与动力学课程节选

Point number two is that ionic solids at high temperatures make ionic liquids.

第二点是离子固体,在高温下会变成离子液体。

麻省理工公开课 - 固态化学导论课程节选