teach vt.教,讲授,教导,教育vi...teach a pig to play on a flute 做不可能做到的事...teach one's granny how to suck eggs 班门弄斧...teach an old dog new tricks 使守旧的人接受新事物...teach-in n.(大学师生对政府政策进行讨...Never offer to teach fish to swim 不要班门弄斧...
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