on campus是指在校园里。例句：We warmly welcome young and ambitious talents to join our campus talk tonight .
campus用法
用作名词 (n.)
The campus of Harvard University is very beautiful.
哈佛大学的校园非常漂亮。
Is Berkley the biggest campus of the University of California?
伯克莱校区是加州大学最大的校区吗?
Do you like campus life?
你喜欢大学生活吗?
The university refused to let Dick Gregory speak on campus.
这所大学不让迪克·格雷戈里在校园里发表演说。