boiling kier

例句：

1. 1. The pot of water is boiling over with steam.
   锅里的水正在沸腾，冒出蒸汽。
2. 2. The soup was simmering on the stove.
   汤在炉子上慢炖着。
3. 3.The milk was bubbling over in the pan.
   牛奶在锅里沸腾了。