4 sentences

1. 人生是一条单行道。

   rén​shēng shì yī tiáo dān​xíng​dào.

   Life is a one-way street.

   Source: AI Challenger 2017

2. 它是一条单行道。

   tā shì yī tiáo dān​xíng​dào.

   It's a one-way street.

   Source: OpenSubtitles

3. 小心不要在单行道逆向行驶。

   xiǎo​xīn bù​yào zài dān​xíng​dào nì​xiàng xíng​shǐ.

   Be careful not to drive the wrong way on a one-way street.

   Source: Tatoeba

4. 你永远不希望电子邮件沟通感觉像一条单行道。

   nǐ yǒng​yuǎn bù xī​wàng diàn​zǐ​yóu​jiàn gōu​tōng gǎn​jué xiàng yī tiáo dān​xíng​dào.

   You never want email communication to feel like a one-way street.

   Source: CCMatrix