He made quick progress by diligent study.
加之他刻苦，长进很快。
Diligent study is an unceasing trend for Chinese people.
刻苦学习是民族永不过时的时尚！
We both have to be more diligent in our study.
我们都必须更勤奋地学习。
The diligent work, strengthens the study and progress!
勤奋工作，加强学习，不断进步！
I completed this subject paper with diligent research and study.
经过我的刻苦钻研和学习，我已经把这个课题做完了。
Hope everybody can be diligent together, study together!
希望大家可以一起努力，一起学习！
Hope everybody can be diligent together, study together!
希望大家可以一起努力，一起学习！
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