acquaintance

/əkˈweɪntəns/

personal knowledge or information about someone or something

中文释义：相识；了解；熟人

I have only a passing acquaintance with the works of Shakespeare.

我对莎士比亚的作品只有粗略的了解。

He is not a close friend, just a business acquaintance from a conference.

他不是密友，只是会议上认识的生意上的熟人。