他们非常认真的学习，英语仅是他们学得一方面。

They are very committed to learning.

youdao

我们所有的老师都有丰富的知识和良好的品德，他们非常认真地教导我们。

All our teachers are rich in knowledge and of good character and they teach us very earnestly.

youdao

苏：没错。放学后他们上补习班学数学或英文。在那里他们非常认真地学习。

SUE: That's right. After their school day is over, they go to a special institute to study math or English. They are very serious about learning over there.

youdao