4 sentences

1. 工人们把沙，石子和水泥混和成混凝土。

   gōng​rén men bǎ shā, shí​zǐ hé shuǐ​ní hùn​hé chéng hùn​níng​tǔ.

   The workmen mixed sand, gravel, and cement to make concrete.

   Source: UM-Corpus: News

2. 从混凝土中长出的树苗为动物们提供了食物。

   cóng hùn​níng​tǔ zhōng zhǎng chū de shù​miáo wèi dòng​wù men tí​gōng le shí​wù.

   The saplings growing out of the concrete provide food for animals.

   Source: OpenSubtitles

3. 这个6-10吨重的混凝土屋顶被吹到空中，然后垂直降落到洞里。

   zhè​ge6-10 dūn zhòng de hùn​níng​tǔ wū​dǐng bèi chuī dào kōng​zhōng, rán​hòu chuí​zhí jiàng luò dào dòng li.

   This 6-10 tonne concrete roof was blown into the air and then landed vertically into the hole.

   Source: CCMatrix

4. 混凝土和大理石地板，以及其他坚硬的表面，会导致你的脚抽筋。

   hùn​níng​tǔ hé dà​lǐ​shí dì​bǎn, yǐ​jí qí​tā jiān​yìng de biǎo​miàn, huì dǎo​zhì nǐ de jiǎo chōu jīn.

   Concrete and marble floors, as well as other hard surfaces, can cause your feet to cramp.

   Source: CCMatrix