revolve around someone/something
phrasal verb with revolve verb [ I or T ] uk/rɪˈvɒlv/ us/rɪˈvɑːlv/
(UK also revolve round someone/something)
以…为中心；以…为主题；围绕…
to have someone or something as the main or most important interest or subject
The conversation revolved around childcare problems. 这次会谈的中心议题是儿童保育方面的问题。
His whole life revolves around football. 足球是他生活的中心。