3 sentences

1. 人类生活必定是某种错误。

   rén​lèi shēng​huó bì​dìng shì mǒu​zhǒng cuò​wù.

   Human life must be some kind of mistake.

   Source: CCMatrix

2. 他必定会觉察到你的错误。

   tā bì​dìng huì jué​chá dào nǐ de cuò​wù.

   He's bound to notice your mistake.

   Source: AI Challenger 2017

3. 既然空气有重量，它就必定压向地球的表面。

   jì​rán kōng​qì yǒu zhòng​liàng, tā jiù bì​dìng yā xiàng dì​qiú de biǎo​miàn.

   Since air has weight, it must press down on the surface of the earth.

   Source: UM-Corpus: Education