compulsoryadj.强制的;势在必行的;义务的
compulsory pilotage强制导航
compulsory subjectsn.必修科目
compulsory contents强制性内容
compulsory sanction强制性制裁economic sanction(s)经济制裁, 经济抵制
compulsory deviance强迫性越轨
Compulsory elements强制性要素
compulsory purchasen.强制性收买
compulsory checkoff强制预扣
compulsory exercise规定动作
compulsory immunity强制免疫