5 sentences

1. 这条大河最终注入了大海。

   zhè tiáo dà​hé zuì​zhōng zhù​rù le dà​hǎi.

   This large river eventually flows into the sea.

   Source: Dong Chinese Dictionary

2. 专家们正在寻找这条大河的发源地。

   zhuān jiā men zhèng​zài xún​zhǎo zhè tiáo dà​hé de fā​yuán​dì.

   Experts are looking for the source of this great river.

   Source: Dong Chinese Dictionary

3. 鸭绿江是位于中朝边境的一条大河。

   yā lù jiāng shì wèi​yú Zhōng Cháo biān​jìng de yī tiáo dà​hé.

   The Yalu River is a major river located on the border between China and North Korea.

   Source: Dong Chinese Dictionary

4. 书里记载，这条大河在隋代被称为渝水。

   shū lǐ jì​zǎi, zhè tiáo dà​hé zài Suí​dài bèi chēng​wéi Yú​shuǐ.

   It is recorded in the book that this great river was called Yushui in the Sui Dynasty.

   Source: Dong Chinese Dictionary

5. 许多小溪流聚合在一起，形成了一条大河。

   xǔ​duō xiǎo xī​liú jù​hé zài yī​qǐ, xíng​chéng le yī tiáo dà​hé.

   Many small streams joined together to form a large river.

   Source: Dong Chinese Dictionary