a tight rein

• 严格的纪律

a tight rein的用法和样例：

例句

1. A good character is formed by strict discipline.
   好的性格是靠严格的纪律培养起来的。
2. 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。

词汇搭配

• keep a tight rein on 约束