Sponge it down thoroughly before you paint it again. 再次刷漆之前要用海绵彻底地把它擦洗下来。
PHRASAL VERBS
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ˈsponge off
PHRASAL VB T INFORMAL
sponge off sb: to ask for money and other things from friends or relatives and make no effort to give anything back or pay for anything yourself 依赖（某人）生活；寄生在（某人）家里