2 sentences

1. 我看到一些大陨石坑。

   wǒ kàn dào yī​xiē dà yǔn​shí​kēng.

   I saw some large craters.

   Source: AI Challenger 2017

2. 月球的表面满是陨石坑。

   yuè​qiú de biǎo​miàn mǎn​shì yǔn​shí​kēng.

   The surface of the moon is full of craters.

   Source: AI Challenger 2017