Vacuum
01
an electrical appliance that cleans surfaces by suction
例子
The vacuum picked up all the dust and crumbs.
02
an empty area or gap in a physical sense
例子
There was a vacuum in the room where furniture had been removed.
03
真空, 虚空
a space that is utterly empty of all matter
例子
The concept of a perfect vacuum, where no particles or energy exist, is theoretical and is used in thought experiments and theoretical physics.
完美真空的概念，即没有任何粒子或能量存在，是理论性的，用于思想实验和理论物理。
04
a gap, lack, or absence in a situation, system, or abstract context
例子
A vacuum of authority allowed confusion to spread.
