old school

同根派生

I, came across an old school friend in Oxford Street this morning.
今天早上我在牛津大街碰见一位老校友。
How many of your old school friends do you keep up with?
你和中学时的老同学保持联系的有多少?
It's hard to keep track of (ie maintain contact with) all one's old school friends.
与中学时的所有老校友都保持联系是很困难的。
I want to search out an old school friend.
我想寻找我的一个老同学。
And here, too, was a young man, the youngest son of a stern and zealous divine of the old school.
这里也有一个年轻人，他名叫安吉尔·克莱，是一位严厉而热情的守旧派牧师的小儿子。