disciplinarian

名词 disciplinarian:

1. someone who demands exact conformity to rules and forms
   同义词：martinet, moralist

1. He's a good teacher but he's not much of a disciplinarian.
   他是个好教师，但却不是个很好的纪律执行者。

dis.ci.pli.nar.i.an

n.（名词）
One that enforces or believes in strict discipline.
执行纪律者，严格纪律信奉者
adj.（形容词）
Disciplinary.
纪律的，训练的