名词
中文翻译：真空返回
同义词：
['vacuum recycle', 'vacuum return to vacuum']
例句：
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1. The vacuum cleaner is designed to clean up dirt and dust in a room.
真空吸尘器设计用来清理房间中的灰尘和污垢。
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2. The company has been using this vacuum return system for years.
这家公司多年来一直使用这个真空回收系统。
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3. The vacuum return process helps to reduce the amount of waste that ends up in landfills.
真空回收过程有助于减少最终进入垃圾填埋场的废物量。