Mary is, so to speak, a hardworking student.

玛丽可说是个用功的学员。

youdao

My host sister is a really hardworking student.

我寄宿家庭里的姐姐是一个非常用功的学生。

youdao

She proved to be a most conscientious and hardworking student … She was pleasant, co-operative and helpful in group situations which meant she was well liked by others in the class.

她证明了自己是一个努力用功的学生，她在小组合作中是愉快并且乐于助人的这意味着她喜欢团队合作。

youdao

Born the son of a stern headmaster in the northern state of Kedah in 1925, young Mahathir was a hardworking student, the winner year after year of the English prize and editor of the school magazine.

CNN: Mahathir Mohamad