Examples

保送留学生

a student recommended to study abroad → 保送

回国留学生

student who has returned from abroad; returned student → 回国

说是留学生，可不知道他在哪儿留的学。

He is said to have studied abroad, but I don't know what country he studied in. → 说是

我们学校有很多韩国留学生。

There are many Korean students in our university. → 留学生

这个外国留学生还有一个汉姓欧阳。 → 汉姓

an exchange student

(两国之间)交换的留学生 → exchange

I have been tasked with helping the foreign students if they have some question about our campus.

我的职责就是协助外国留学生，帮解决他们在校园里遇到的问题。 → task