After ten years' hard study noticed by none, his fame fills the land once honours are won.

十年寒窗无人问，一举成名天下知。

《新英汉大辞典》

Day after day and year after year, Zuo Si gradually grew up. Because of his unremitting afforts in hard study, he became an erudite scholar and wrote very excellent essays.

日复一日，年复一年，左思渐渐长大了，由于他坚持不懈地发奋读书，终于成为一位学识渊博的人，文章也写得非常好。

youdao

Doing the job meant that I'd miss a lot of classes until the election was over in early November, but I thought I could make it with borrowed notes and hard study at the end of term.

承担这项工作意味着在11月初竞选结束之前，我要漏掉许多课程，但是我觉得我能应付得来，我可以借用别人的笔记，在学期末的时候再用用功就行了。

youdao

My mother always told me, if you study hard, the answers should be right under your nose or easily seen.

VOA: special.2009.09.13

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 couldn't afford to tell those kids on the West Side or the South Side, if you work hard, if you study hard, if you're hitting the books, that you're going to be able to afford to go to college.

WHITEHOUSE: Remarks by the President at a DNC Event

The atmosphere in some schools is so hostile that girls find it hard to study.

ECONOMIST: South Africa: Wolves in teachers’ hats | The

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

WHITEHOUSE: President Obama Speaks on the 2013 Budget