vacuum

n. 真空,空间,真空吸尘器
a. 真空的,产生真空的,利用真空的
v. 用吸尘器打扫

His wife's death left him a vacuum in his life.

他妻子的去世使他的生活变得空虚。

Some pumps and all vacuum cleaners work by suction.

有些泵和所有真空吸尘器都是借吸力工作的。