名词
中文翻译：真空
同义词：
['depressed', 'empty', 'vacant', 'vacuum cleaner']
例句：
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1. The vacuumcleaner is very efficient at cleaning hard floors.
真空吸尘器在清洁硬地板方面非常高效。
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2.The room was completely vacated by the fire.
房间被大火彻底清空了。
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3. The vacuum cleaner will help remove all the dirt and dust from the carpet.
真空吸尘器将帮助从地毯上去除所有灰尘和污垢。