hold forth

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

滔滔不绝地讲, 长篇大论

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.
他一有机会就喜欢滔滔不绝地谈论政治。
The professor would often hold forth on his latest research findings.
教授经常滔滔不绝地讲述他最新的研究成果。