(of a person or action)lacking good sense or judgement; unwise
(人,行动)愚蠢的,傻的
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it was foolish of you to enter into correspondence. 与他们通信,你真傻。
[as complement]silly; ridiculous
愚蠢的,荒谬的
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he felt that he'd been made to look foolish. 他感到自己被弄得一副傻相。