I am sorry to reply your email so late, as I joined a course recently.

很抱歉这么迟回你邮件，因为最近我报了一个课程在读。

youdao

I am sorry to reply your email so late, as I joined a course recently.

很抱歉这么迟回你邮件，因为最近我报了一个课程在读。

youdao