n.嚴(yán)行紀(jì)律的人
adj.紀(jì)律的
The teacher is a formidable disciplinarian. 這位老師對(duì)紀(jì)律抓得很嚴(yán)。
He's a good teacher but he's not much of a disciplinarian. 他是個(gè)好教師,但卻不是個(gè)很好的紀(jì)律執(zhí)行者。