high school classmates高中同学 college mates大学同学 你也可以称 alumnus/alumni 大学校友 students 是 学生
高中同学 - High school classmates, high school mates 大学同学 - University classmates, university mates 或美国: college classmates, college mates.
High school students university students
high school mate university school mate 足够正式了
