1.Not traveling when you had the chance.

有机会的时候不去旅行。

2.Not learning another language.

没能学一门外语。

3.Staying in a bad relationship.

沉迷于一段糟糕的感情。

4.Not quitting a terrible job.

没有辞去一份糟糕的工作。

5.Not trying harder in school.

在学校时功课不努力。