The teacher urged him to study assiduously.

老师勉励他刻苦学习。


urge sb to do sth: 勉励（极力主张）某人去做某事    例：The teacher urged him to learn modestly from others. 老师勉励他虚心向别人学习。She urges me to take steps in the matter.她催我处理此事。He urged the necessity for immediate action.他极力主张马上采取必要的行动。