3 sentences

1. 现在她一次至少买30袋木炭。

   xiàn​zài tā yī​cì zhì​shǎo mǎi30 dài mù​tàn.

   Now she buys at least 30 bags of charcoal at a time.

   Source: CCMatrix

2. 我们在美术课上学习了木炭画。

   wǒ​men zài měi​shù kè shang xué​xí le mù​tàn​huà.

   We learned charcoal drawing in the art class.

   Source: AI Challenger 2017

3. 我买了一幅绘着大教堂的木炭画。

   wǒ mǎi le yī fú huì zhe dà​jiào​táng de mù​tàn​huà.

   I bought a charcoal drawing of the cathedral.

   Source: AI Challenger 2017