As he went back to the class room, he taught the importance of keeping cilent in the classroom for nearly an hour.

当他回到教室后，他向全班同窗讲了关于坚持课堂纪律的重要性，足足有一个小时。

youdao

As he went back to the class room, he taught the importance of keeping cilent in the classroom for nearly an hour.

当他回到教室后，他向全班同窗讲了关于坚持课堂纪律的重要性，足足有一个小时。

youdao