贪玩欢子
班门弄斧_百度翻译[词典]teach one's grandmother (how) to suck eggs; display one's slight skill before an expert; teach fish to swim; show off in the presence of an expert;[例句]但我已经使我的事业挣了30年的钱了，所以他是在故意班门弄斧。But I've been making good money for30 years so he's teaching a fish how to swim.百度翻译
starcraftgod
Carry coal to Newcastle这是句谚语，纽卡斯尔(Newcastle)是英国以产煤而著称的城市，将煤运到纽卡斯尔, 就是多此一举，班门弄斧。
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