harp on (about sth)
phrasal verb with harp verb uk/hɑːp/ us/hɑːrp/
UK disapproving (US harp on sth)
反复谈论;不停抱怨
to talk or complain about something many times
He's always harping on about lack of discipline. 他总是抱怨纪律涣散。
I know you want to go to Paris. Don't keep harping on (about it)! 我知道你想去巴黎。但别一直唠叨个不停！