mass noun
1- Chemistry the process of boiling a liquid so that any vapour is liquefied and returned to the stock【化】回流。
1.1
- technical the flowing back of a liquid, especially that of a fluid in the body〈技〉（液体, 尤指体内液体的）回流, 反流。
no obj.
1- Chemistry boil or cause to boil in circumstances such that the vapour returns to the stock of liquid after condensing【化】使回流。
1.1
- no obj., with adverbial of direction technical (of a liquid, especially a bodily fluid) flow back〈技〉（液体, 尤指体内液体）回流, 反流。