He was not a very hard-working student when he was young.
他年轻时不是一个很用功的学生。
Li Kang is a hard-working student and we should learn from him.
李康学习很用功，我们应向他学习。
My deskmate is a hard-working student, who keeps the school rules well.
我的同桌是一个勤奋的学生，他严格遵守学校的规章制度。
EXAMPLE: Once my son realized that life is not all fun and games, he became a serious, hard-working student.
当我的儿子意识到，娱乐并不是生活的全部，他开始认真努力学习了。
We can never be satisfied as long as there is still one hard-working student who has to be in perplexity and search arduously for a similar exercise from a high stack of books.
只要还有一个勤奋刻苦的学生，在一堆厚厚的教辅书中翻来翻去、搔首踟蹰，费力地寻找那似曾相识的题目和解答，我们就绝不会满足。
We can never be satisfied as long as there is still one hard-working student who has to be in perplexity and search arduously for a similar exercise from a high stack of books.
只要还有一个勤奋刻苦的学生，在一堆厚厚的教辅书中翻来翻去、搔首踟蹰，费力地寻找那似曾相识的题目和解答，我们就绝不会满足。
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