2 sentences for 沸腾 (fèi​téng — boil)

1. 锅里的水已经沸腾了。

   guō lǐ de shuǐ yǐ​jīng fèi​téng le.

   The water in the pot is already boiling.

   Source: Dong Chinese Dictionary

2. 在实验室条件下，纯水可以被加热到过热状态而不沸腾。

   zài shí​yàn​shì tiáo​jiàn xià, chún​shuǐ kě​yǐ bèi jiā​rè dào guò rè zhuàng​tài ér bù fèi​téng.

   Under laboratory conditions, pure water can be heated to a superheated state without boiling.

   Source: Dong Chinese Dictionary