Don't confine your learning only to schoolwork.

不要把自己的学习只局限于课堂。

　　动词词组confine...to...，把……局限在……之内。
　　例句：
　　He is asked to confine his use of the telephone to business calls alone.
　　他被告知，只能用这部电话处理公务。
　　They managed to confine the disease to a small area.
　　他们设法将疾病控制在小范围之内。