Class must listen earnestly.

上课要认真听讲。

youdao

Only the swallow stayed there to listen earnestly.

只有小燕子还在那里认认真真地听。

youdao

First of all, in class, I must listen earnestly, don't do things, not a good study hard, whispering in students, the new term should set yourself a goal just good.

首先，上课的时候，我要认真听讲，不做小动作，不和同学交头接耳，好好努力学习，新的学期应该给自己订一下目标才好。

youdao