名词
中文翻译：真空
同义词：
['vacuous', 'vacuuming']
例句：
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1.The vacuum cleaner is very effective at cleaning hard floors.
真空吸尘器在清洁硬地板方面非常有效。
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2. He vacuums the carpet every week to keep it clean.
他每周都吸尘，保持地毯干净。
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3.The vacuum cleaner was designed to remove dust and dirt from the floor.
这款吸尘器设计用来从地板上去除灰尘和污垢。