污渍

cā diào wū zì

擦掉污渍

wipe off a spot

liú xia wū zì

留下污渍

leave a stain

wǒ zěn me cái néng bǎ zhè diǎn wū zì chú qù

我怎么才能把这点污渍除去？

How can I get this stain out?

duì yú rèn hé wū zì dōu yī dìng yào jǐn kuài chǔ lǐ

对于任何污渍，都一定要尽快处理。

Always treat any stain as soon as you can.