英语词汇“徒劳无功”的读音、翻译、释义、用法及例句-集火网

词汇	徒劳无功
释义	徒劳无功 be a fool for one's pains make a futile effort
随便看	securities industry securities investment trust securities issued securities market securities owned securities portfolio securities ratings securities substitution companies securities trading securities transactions tax security security access token Security Account Manager security administration security agreement security analysis security arrangement security axiom security body security capital security class security classification security clearance security code security coefficient

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