短語詞組短語administrative compulsory enforcement subject 行政強(qiáng)制執(zhí)行主體professional compulsory subject 專業(yè)必修課required subject compulsory subject 必修科a compulsory subject 必修科目obligatory subject compulsory required 必修課be subject to compulsory certification 必須經(jīng)過認(rèn)證 返回 compulsory subject