discharge steam

• 排出蒸汽,废汽

discharge steam的用法和样例：

例句

1. When water boils , it gives off steam.
   水一沸腾便冒出蒸汽。
2. Soon jets of steam were spurting from one of the outlets of the machine.
   很快，从机器的一个出口喷射出蒸汽来。