He made quick progress by diligent study.

加之他刻苦，长进很快。

youdao

Diligent study is an unceasing trend for Chinese people.

刻苦学习是民族永不过时的时尚！

youdao

Diligent study is an unceasing trend for Chinese people.

刻苦学习是民族永不过时的时尚！

youdao