Rub,scrape,wipe,mop,scratch这几个单词都有擦的意思，但是不同的是什么？擦 [cā]动词（摩擦） rub:strike a match;擦根火柴rubbing one's hands together;摩拳擦掌just a scratch on the hand. Rub one's hands 是什么意思rub one's hands (因高兴、不知所措等)搓自己的双手 Rub off 和rub away 区别rub off (使)摩擦掉a shame does not rub off.耻辱无法抹灭。she couldn't rub off the blood stain on her blouse.她没法将上衣的血渍擦掉。 (使)减色with the passing of.
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