on the boil

• adv. 沸腾着(在沸点)

on the boil的用法和样例：

例句

用作副词 (adv.)

1. Mum told me to keep the kettle at the boil.
   妈妈叫我让壶里的水一直沸腾着。
2. A pot of water was bubbling on the range.
   一壶水在炉上沸腾着。