manual cleaning

例句：

1. 1. We need to manually clean the windows before the party.
   在派对前，我们需要手动清洁窗户。
2. 2.Manual cleaning is a great way to keep our homes clean and hygienic.
   手动清洁是保持我们家庭干净和卫生的好方法。
3. 3. The manual cleaning equipment was very useful in the disaster relief effort.
   手动清洁设备在救灾工作中非常有用。