He is a very diligent student.

他是一个非常勤勉的学生。

She is a very diligent student.

她是一个非常勤奋的学生。

He is very smart, moreover, he is very diligent.

他很聪明，更何况他还很勤奋。

The servant girl in her house is very diligent.

她家的丫鬟非常勤快。

Singh has a reputation for being very diligent.

辛格以非常勤奋而闻名。

This disciple is very diligent and always the first to arrive at the training ground.

这位徒弟非常勤奋，总是第一个到达训练场。

He is a very diligent person.

他是个很勤劳的人。

A. Most of the students are very diligent, but it's different in the case of Mary.

大多数学生很勤奋，但就玛丽而言却不是这样。