3 sentences

1. 这条新修的公路宽阔而平坦。

   zhè tiáo xīn xiū de gōng​lù kuān​kuò ér píng​tǎn.

   This newly built road is wide and flat.

   Source: Dong Chinese Dictionary

2. 山坡上那块平坦的坪地是村民聚会的地方。

   shān​pō shàng nà kuài píng​tǎn de píng dì shì cūn​mín jù​huì de dì​fang.

   The flat clearing on the hillside is where the villagers gather.

   Source: Dong Chinese Dictionary

3. 在一片平坦的荒原上，偶尔能看到几个起伏的小牡。

   zài yī piàn píng​tǎn de huāng​yuán shàng, ǒu'ěr néng kàn​dào jǐ gè qǐ​fú de xiǎo mǔ.

   On the flat wasteland, one can occasionally see a few undulating hillocks.

   Source: Dong Chinese Dictionary