M: Oh, through a lot of hard work, of course.

M：哦，当然是通过大量艰辛的工作了。

youdao

David: Oh, through a lot of hard work, of course.

大卫：哦，当然是通过大量艰辛的工作了。

youdao

David: Oh, through a lot of hard work, of course.

大卫：哦，当然是通过大量艰辛的工作了。

youdao