harp on

US /hɑːrp ɑːn/
UK /hɑːrp ɑːn/
"harp on" picture
1.

嘮叨, 糾纏

to talk or write persistently and tediously on a particular subject

:
He keeps harping on about the good old days.
他老是嘮叨著過去的好時光。
I wish she wouldn't harp on my mistakes.
我希望她不要老是糾纏我的錯誤。