keep a tight rein on someone/something idiom (also keep someone/something on a tight rein)
对…严加约束；对…严加控制
to have a lot of control over someone or something
My father always kept us on a tight rein. 我父亲对我们总是严加管教。
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。