Exhaled air

• 呼出气体

Exhaled air的用法和样例：

例句

1. When a balloon spurts air, which direction will it fly in?
   喷出气体时，气球将向哪个方向飞行？
2. The virus spreads through the air when an infected person expels air suddenly.
   当感染者急促地排出气体时病毒通过空气传播。