在聚会上，我和许多老同学叙旧。

During the reunion, I caught up with many old schoolmates.

毕业后，他与老同学失去了联系。

He lost contact with his old classmates after graduation.

上周末的聚会上，我遇到了我的老同学。

I met my old schoolmate at the reunion last weekend.

我想寻找我的一个老同学。

I want to search out an old school friend.

我散步时赶巧遇见个老同学.

I was out for a walk when I bumped into an old school friend.

我的老同学分散在全国各地.

My old school friends are scattered far and wide over the country.

老同学，我认为是最好的背心。

Old school vests are the best in my opinion.

老同学聚会在一起，分外亲热。

The meeting of the old classmates was extremely cordial.

祝老同学新年快乐，健康第一！

Happy new year to every old classmates !

这些信件主要是我老同学写来的。

The letters were in the main from my old classmates.