revolve around sb/sth
= to have someone or something as the main or most important interest or subject以...為中心；以...為主題；圍繞...。
revolve verb [ I or T ]（使）旋轉(zhuǎn)；（使）轉(zhuǎn)動(dòng)；（使）環(huán)繞，圍繞。
【例句】
The conversation revolved around childcare problems.
這次會(huì)談的中心議題是兒童保育方面的問題。
His whole life revolves around football.
足球是他生活的中心。