The school year is divided into three trimesters.

一学年分三个学期。

The school year is almost over.

本学年快结束了。

It had been the end of the school year when it happened three years ago, only a few days after my fourteenth birthday.

那还是三年前的事，当时学年就要结束，我的十四岁生日刚刚过去几天。

The school year begins in autumn.

秋季始业。

The school year begins Monday.

周一是学年的开始。