He could work hard and study hard.

他还可以一边努力干活，一边努力学习。

youdao

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》

I want to go to school and study hard.

我想上学，努力学习。

youdao

He said they believed that to study hard and perform well in school was "acting white."

VOA: special.2009.11.01

and just, you know, work hard and study, do your homework, eat well too, I'm sure that helps

所以，我的建议是，努力学习，认真完成作业，
同时也好好吃饭，这真的很重要哦。

如果是在考虑留学 - SpeakingMax英语口语达人

And as far as right now, just study hard, learn the material that will help you succeed.

就现阶段来讲，最重要的是勤奋学习，有一些知识是走向成功必不可少的，你要好好学习这些知识。

如果是在考虑留学 - SpeakingMax英语口语达人

We work and we hustle, you study hard to get your degree -- because you believe in success and individual initiative.

WHITEHOUSE: President Obama Speaks on Student Loan Interest Rates in Colorado | The White House

And we expect people to earn it -- study hard, work hard for it.

WHITEHOUSE: President Obama Speaks on the 2013 Budget

Gabby is someone who has obviously made a very careful study of what makes her happy, and worked hard to bring those elements into the forefront of her life, so I was curious to hear what she had to say on the subject of happiness.

FORBES: How Would I Behave If I Were Happy