碰巧，她的生日就在我的生日之后。

___As ___it ___happens, her birthday is the day after mine.

碰巧，我正在为自己找一个计算机课程，想参加你们的一个课程。

___As ___it ___happens, I am currently looking for a computer course for myself and I would like to join one of your courses.

碰巧，我们俩在同一家公司工作。

___As ___it ___happens, we both work for the same company.