The hiring manager recognized the applicant as a former classmate from business school.

招募經理認出這位應徵者是他商學院時期的老同學。

On my flight to Tokyo, I happened to sit next to an old college classmate.

我在飛往東京的班機上，剛好坐在一位大學老同學旁邊。

My former classmate now works in our finance department and approves expense reports.

我以前的同學現在在我們財務部工作，負責核准費用報告。