trivacancy

例句：

1. 1. The vacuum in theroom was so strong that it felt likea vacuum cleaner.
   房间里的真空太强了，感觉像吸尘器一样。
2. 2. The vacuumcleaner is designed to remove dust and dirtfrom the carpet.
   吸尘器被设计用来从地毯上吸走灰尘和污垢。
3. 3. Thevacuum cleaner has become an essential tool forcleaning homes.
   吸尘器已经成为清洁家庭必备的工具。