认真学习并且刻苦练习 study and train hard
XX同学学习认真刻苦，思想灵活，有很大的发展潜力。
XX schoolmate studies earnestly assiduous, the thought is flexible, has the very big development potential.
本科期间，我学习认真刻苦，成绩优秀，多次获得奖学金和三好学生称号。
When I was an undergraduate student, I was studying industriously and awarded scholarships as well as the title of 'Merit student' many times.
虽然聪明的小孩可能没有必要在学习简单的低年级功课时刻苦努力，但是当课程加深后他们会学地很费力而且成绩很差，原因在于他们并没有认真去学。
Although smart kids may not need to work hard in the lower grades, when the work is easy, they may struggle and perform poorly when the work gets harder because they do not make the effort to learn.
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