hold forth

US /hoʊld fɔːrθ/
UK /hoʊld fɔːrθ/
"hold forth" picture
1.

滔滔不絕地講, 長篇大論

to speak at length about a subject, often in a rather boring or pompous way

:
He loves to hold forth on politics whenever he gets the chance.
他一有機會就喜歡滔滔不絕地談論政治。
The professor would often hold forth on his latest research findings.
教授經常滔滔不絕地講述他最新的研究成果。