bang on
phrasal verb with bang verb uk/bæŋ/ us/bæŋ/
UK informal disapproving
喋喋不休，说个没完
to talk about something for a long time, especially in a way that is boring to other people
My parents are always banging on about how much better life was 20 years ago. 我父母总是没完没了地唠叨20年前的生活是多么多么好。