名词
中文翻译：真空
同义词：
['vacuous', 'vacuum-like']
例句：
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1. The vacuumcleaner is designed to suck up dust anddirt.
真空吸尘器设计用来吸走灰尘和污垢。
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2. The room was left in avacuum after the fire.
火灾过后，房间一片狼藉。
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3. The vacuum cleaner has becomean essential tool for cleaning homes.
真空吸尘器已成为清洁家庭必备的工具。