Chinese idioms：口若悬河 (Kǒuruòxuánhé)

Jìncháo shí, yǒu yí wèi dà xuéwènjiā, míng jiào Guō Xiàng(gōngyuán 252 nián -gōng yuán 312 nián). Tā niánqīng de shíhòu, jiù yǐjīng shì yí gè hěn yǒu cáixué de rén le.
晋朝时，有一位大学问家，名叫郭象（公元252年-公元312年）。他年轻的时候，就已经是一个很有才学的人了。
There was a famous scholar named Guo Xiang (252 AD -312 AD) in Jin Dynasty. When he was young, he was already a very talented scholar.

Tā zhīshí yuānb, duì xǔduō shìqíng chángcháng yǒu dúdào de jiànji, wúlùn shénme shìqíng dōu néng shuō dé tóutóu-shìdà. Tā de kǒucái yě hěnhǎo, měi dāng tā fābiǎo yánlùn, rén men dōu tīng dé jīnjīn-yǒuwèi. Dāngshí yǒu yí wèi Tàiwèi, jiào Wáng Yǎn, shífēn xīnshǎng Guō Xiàng de kǒucá. Tā chángcháng zài biérén miànqián chēngzàn Guō Xiàng shuō:” Guō Xiàng shuō huà, jiù hǎoxiàng yì tiáo dǎoxuán qǐlái de héliú, tāotāo-bùjué de xiàng xià guànzhù, yǒngyuǎn méiyǒu kūjié de shíhòu.”
他知识渊博，对许多事情常常有独到的见解，无论什么事情都能说得头头是道。他的口才也很好，每当他发表言论，人们都听得津津有味。当时有一位太尉，叫王衍，十分欣赏郭象的口才。他常常在别人面前称赞郭象说：“郭象说话，就好像一条倒悬起来的河流，滔滔不绝地向下灌注，永远没有枯竭的时候。”
He was knowledgeable and had his unique opinions on many things. He was very eloquent and could talk about everything in a clear and logical way. Every time when he gave a speech, people around him all listened with great interest. There was an official named Wang Yan. He appreciated Guo Xiang's eloquence very much. He often praised Guo Xiang in front of other people, "When Guo Xiang gives a talk, his speech is like a waterfall. It flows out and never dries up."

Words：
渊博yuānbó： profound (adj.)
见解jiànjiě： opinion (n.)
头头是道tóutóushìdào： clear and logical
津津有味jīnjīnyǒuwèi： with great interest
称赞chēngzàn： praise (v.)
枯竭kūjié： dry up (v.)
Meanings：
口若悬河：“悬河”，指瀑布。“口若悬河”指讲起话来像瀑布一样滔滔不绝。形容能言善辩，也比喻十分健谈。
"悬河"（a river upside down） refers to a waterfall. "口若悬河" refers to "one's speech is like a waterfall." It usually used to describe someone eloquent or talkative.

Sentences：
1.Dǎoyóu xiǎojiě duì měi gè jǐngdiǎn dōu shífēn shúxī, chángcháng kǒuruò-xuánhé dd wèi wǒmen jièshào dāngdì de lìshǐ hé chuánshuō.
导游小姐对每个景点都十分熟悉，常常口若悬河地为我们介绍当地的历史和传说。
The tourist guide is very familiar with every place of interests. She talks about the local history and tradition of each place like 口若悬河.

2. Zài zuótiān de biànlùn sài shàng, shuāngfāng zhǔbiàn kǒuruò-xuánhé, nǐlái-wǒ wǎng, shífēn jīngcǎi.
在昨天的辩论赛上，双方主辩口若悬河，你来我往，十分精彩。
The first speakers from the affirmative side and negative side were all very 口若悬河 on the debate yesterday. They gave us an excellent debate show.