2. Of course, exhaust fan is indispensable. 当然,排气扇是必不可少的。
3. The air reeked of solvents and exhaust fumes. 空气中充满了溶剂和废气的味道。
英英解释
n.
1. gases ejected from an engine as waste products
2. system consisting of the parts of an engine through which burned gases or steam are discharged v.
1. wear out completely
2. use up (resources or materials)
3. deplete
4. use up the whole supply of
5. create a vacuum in (a bulb, flask, reaction vessel)