pull up one's socks 重新再做

【讲解】

sock意指“短袜或护套（短袜状）”。该习语直译为“提上自己的袜子”，形容某人要快步跟上，引申为“努力工作，重新再做”。例如：The class were told that there would be no outing unless they pulled their socks up.（已经告诉这班的学生，要是他们不努力，就不能出去玩。）

【对话】

A:What do you plan to do in holidays?

A:你假期里准备干什么？

B:I'll have to study.

B:我要学习。

A:Why?

A:为什么？

B:I got a very bad school report this thrm. If I don't pull up my socks. I'll be lagged behind by the class.

B:我这学期的成绩很差，如果再不努力，就跟不上大家了。