3 sentences

1. 你知道谁发明了蒸汽机吗？

   nǐ zhī​dao shéi fā​míng le zhēng​qì​jī ma?

   Do you know who invented the steam engine?

   Source: AI Challenger 2017

2. 蒸汽机的发明改变了一切。

   zhēng​qì​jī de fā​míng gǎi​biàn le yī​qiè.

   The invention of the steam engine changed everything.

   Source: CCMatrix

3. 它们全部由蒸汽机驱动，因此速度慢。

   tā​men quán​bù yóu zhēng​qì​jī qū​dòng, yīn​cǐ sù​dù màn.

   They were all powered by steam engines and therefore slow.

   Source: CCMatrix