2 sentences

1. 时间是无法倒流的。

   shí​jiān shì wú​fǎ dào​liú de.

   Time cannot be turned back.

   Source: OpenSubtitles

2. 芝加哥河是世界上唯一一条倒流的河。

   zhī​jiā​gē hé shì shì​jiè​shang wéi​yī yī tiáo dào​liú de hé.

   The Chicago River is the only river in the world that flows backward.

   Source: CCMatrix