Hi Ior That's an easy one to answer. When studying at university (in South Africa anyway) the student can either travel in every day or they can live in the university accommodation (also known as in residence). Some students however, prefer to live in private accommodation (not belonging to the university) this is known as "off-campus". Campus meaning the university property.

Hello! Living on campus means you live at school provided housing at the school (this mostly applies to college students). Living off campus means you do not live at school and you commute. I don't think there is a specific format of "get... off...", but getting an apartment off campus means renting an apartment not on the school property. Basically "off campus" is just the opposite of "on campus". 希望可以帮助到你~ 基本上意思就是在校外租房，而不是住在宿舍或者学校里。 Edit: Some typos.

Hello! I am not a teacher but I hope I can help you. This sentence does not mean get sth. off sth. but you have to see the phrase "off campus" for itself. So not on the campus :) Hope that helps you greetings Daniel