名词
中文翻译：真空
同义词：
['vacancy', 'vacuum state', 'vacuum furnace']
例句：
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1.The vacuum cleaner is designed to suck up dust and dirt.
真空吸尘器设计用来吸走灰尘和污垢。
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2. The vacuum cleaner has a powerful suction pump.
真空吸尘器有一个强大的抽吸泵。
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3. The vacuum cleaner is used to clean the floor thoroughly.
真空吸尘器被用来彻底清洁地板。