zhè / céng / jiāo / zhuàng / wù / hěn / nán / qīng / chú / qīng / jié / shí / xū / yào / duō / yòng / yì / xiē / shuǐ

这层胶状物很难清除，清洁时需要多用一些水。

This gluey substance is difficult to remove, so more water is needed for cleaning.