口若悬河的英文：
[Literal Meaning]
mouth/like/hang/river
words to slip out like waterfall

[解释]
讲起话来像瀑布一样不停地奔流、倾泻。形容能说会道，说起来没个完。

[Explanation]
to speak with a flow of eloquence

[例子]
这个所谓的教授口若悬河，一直讲了三个小时。

[Example]
This so-called professor spoke with a flow of eloquence and has been talking for three hours.

[英文等价词]
with every other breath

Glibly;nimble of speech;loquacious
口若悬河

a fluent speaker
口若悬河的演说家

Jack Became loquacious on his favorite topic
杰克在他最喜爱的话题上变得口若悬河

A flow of eloquence
口若悬河

A great talker made a torrent of words
口若悬河

A flow of words is no proof of wisdom
口若悬河不能作为才智的证明。

Every time when he gives a report, he always talks eloquently.
每次他做报告口若悬河。

Mr. Thornhill expatiated upon the common topics of conversation with fluency
唐希尔先生平常谈话总是口若悬河的。

He has a fine command of language, and the words stream from his mouth in a torrent.
他精通语言，讲起话来口若悬河。

His self - confident fluency left her no room to talk back.
他口若悬河，自以为是，使她没有机会回话。