3 sentences

1. 那辆旧公共汽车在山路上颠簸行驶。

   nà liàng jiù gōng​gòng​qì​chē zài shān​lù shang diān​bǒ xíng​shǐ.

   The old bus bumped along the mountain road.

   Source: AI Challenger 2017

2. 冰岛内部的所有山路和道路都有松散的砾石表面。

   bīng​dǎo nèi​bù de suǒ​yǒu shān​lù hé dào​lù dōu yǒu sōng​sǎn de lì​shí biǎo​miàn.

   All mountain roads and roads in the interior of Iceland have a surface of loose gravel.

   Source: CCMatrix

3. 山路也经常非常狭窄，并不是为超速行驶而制造的。

   shān​lù yě jīng​cháng fēi​cháng xiá​zhǎi, bìng bù​shì wèi chāo sù xíng​shǐ ér zhì​zào de.

   The mountain roads are also often very narrow, and are not made for speeding.

   Source: CCMatrix