to sniff the air

• 吸入空气

to sniff the air的用法和样例：

例句

1. An engine emits smoke from its funnel into the air.
   机车通过烟囱把烟排入空气里。
2. Suction filter projects over the fluid level and sucks air.
   抽吸过滤器凸出油漆表面，吸入空气。