要充分利用课上的时间。上课认真听老师讲课，以后就可以少花力气。

Make good use of your time in class. Listening to what the teacher says in class means less work later.

youdao

首先，如果不去上课，没有听老师讲课，不完成作业的学生也可以通过考试，这对勤奋的学生是不公平的。

Firstly, if student who do not go to the class, never listen to the teacher, do not finish the homework can pass the course, it is unfair to the diligent student.

youdao

首先，如果不去上课，没有听老师讲课，不完成作业的学生也可以通过考试，这对勤奋的学生是不公平的。

Firstly, if student who do not go to the class, never listen to the teacher, do not finish the homework can pass the course, it is unfair to the diligent student.

youdao