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》

I believe that after continuous hard study, one day I can speak English very well.

我相信在持续不断的努力学习下，有一天我可以把英语讲得非常好。

youdao

I know, Rome was not built in a day. I believe that after continuous hard study, one day I can speak English very well.

我知道罗马并非一日建成。我相信在不断的努力学习之后，总有那么一天我可以说一口流利的英语的。

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.

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

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

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