a mass of very small drops of liquid in the air, for example steam 蒸气；潮气；雾气 water vapour 水蒸气 The particles then form a vapour. 然后这些微粒形成了蒸气。 There was a hissing sound, and clouds of vapour were emitted. 只听见咝咝的声音，接着一团团的蒸气冒了出来。
Oxford Collocations Dictionaryadjective- water
- cloud
- form
- turn to
- emit
- …
- condense
Word Originlate Middle English: from Old French, or from Latin vapor ‘steam, heat’.