wèi le / bù ràng / mù dì bǎn / liú xià / shuǐ yìn / bǎo jié yuán / xiān / bǎ / tuō bù / nǐng de / hěn gān

为了不让木地板留下水印，保洁员先把拖布拧得很干。

To prevent water marks from being left on the wooden floor, the cleaner first wrung the mop out thoroughly.