2 sentences

1. 长江中游的水流相对比较平缓。

   Cháng Jiāng zhōng​yóu de shuǐ​liú xiāng​duì bǐ​jiào píng​huǎn.

   The current in the middle reaches of the Yangtze River is relatively gentle.

   Source: Dong Chinese Dictionary

2. 在这条河流的下流，水流变得非常平缓。

   zài zhè tiáo hé​liú de xià​liú, shuǐ​liú biàn de fēi​cháng píng​huǎn.

   The current becomes very gentle in the lower reaches of this river.

   Source: Dong Chinese Dictionary