英汉词典

1. 不正当的;非法的
    Improper activities are illegal or dishonest.

    e.g. 25 officers were investigated following allegations of improper conduct during the murder inquiry...
           25 名警察在被指控于调查谋杀案期间有非法行为之后受到调查。
    e.g. Mr Matthews maintained that he had done nothing improper.
           马修斯先生坚称他没有做过非法的事情。