Mr. Thomas was taught by the Catholic nuns whose school he attended to work and study hard.

托马斯先生受教于天主教修女。在修女开办的学校里他专心工作，刻苦学习。

《柯林斯英汉双解大词典》

Work hard at school!

在学校努力学习！

youdao

Law-school debt means that they have to work fearsomely hard.

法学院学生的债务意味着他们不得不非常努力地工作。

youdao

Yes, start a company, go to school, work hard, invest, hire people.

WSJ: John H. Cochrane: America Needs an Alternative

Harry pushes Noel to keep fighting, to go to school, to work hard.

FORBES: Taking The Gloves Off

But it's only going to happen if you stay focused and you work hard in school.

WHITEHOUSE: The President Brings Christmas Cheer to Boys and Girls Club