Through Yale you know a lot of people and they don't have to be close friends but they are acquaintances.

通过耶鲁，你能认识很多人,这些人不一定是亲密的好朋友,他们只是相识的人。

耶鲁公开课 - 心理学导论课程节选

Let's say that one of your closest friends is moving away.

假设你最亲密的一个朋友要搬走了。

I'm worried 课堂 - SpeakingMax英语口语达人