cleaner elevator

例句：

1. 1. The cleaners were busy cleaning the office.
   清洁工们正在忙着打扫办公室。
2. 2. The cleaners are responsible for keeping the building clean.
   清洁工负责保持建筑物的清洁。
3. 3. The cleaners were happy to see the mess cleaned up.
   看到混乱被清理干净，清洁工很高兴。