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rubbing n.摩擦、研磨、按摩、摹拓(片)。 rubbing fr...

rubbish

A balloon rubbed with wool becomes “electrified“ . 用毛織品摩擦氣球而“起電”。

“i see you want to rub it in,“ he said . “我看你是要觸人痛處。”他說。