校友会的英文：
alumni association

参考例句：

The alumni chapter get the students together for a party once a year.
这个校友会每年为学生举行一次联谊会。

It has been their hope that their schoolmates in Beijing would establish an alumni association of their own.
外地的校友希望北京能成立一个校友会。

alumni是什么意思：
n. [alumnus]的复数形式；男校友

alumni | alumnus
男校友

My alumni and alumna are present at my birthday party.
我的男校友和女校友都出席了我的生日聚会。

I wonder if there are any alumni of my school at this company.
不知道这家公司里有没有我们学校的校友。

Magdalen alumni include William HagueSeamus Heaney and Oscar Wilde
威廉·黑格(保守党创始人)、谢默斯·希尼(诺贝尔文学奖得主)和奥斯卡·王尔德(小说家)都是玛德莲学院的校友。

A little knot of alumni are having an old home week in the stadium parking lot.
一小群男校友正在体育场停车场团聚。

association是什么意思：
n. 联合，联系；联合体，社团；协会

association centre
联合中枢

Association of Infant Formula Manufacturers
婴儿配方奶制造商协会

The Association holds an annual reunion.
这个协会每年聚会一次。

He was read out of the association.
他被宣布开除出该协会。

Light is associated with sight.
光学与视觉联系在一起。