I often reflect on my schooldays.

我经常回起我上学的日子。

Life often seems to be marked off into different periods: schooldays,marriage,old age.

命似乎分为三个不同期：学,结婚,老年。

His schooldays were a torment.

他的学期是一场苦难。

I wish I could put the clock back and relive my schooldays; I regret not having tried harder and passed more exams.

我希望光能够倒退回去，我可以重新去过学的活。我后悔当初不够努力，没有通过更多的考试。