3 sentences

1. 你只不过刚刚从深海钓鱼回来。

   nǐ zhǐ​bu​guò gāng​gāng cóng shēn​hǎi diào yú huí lai.

   You just came back from deep sea fishing.

   Source: AI Challenger 2017

2. 深海覆盖一半以上的地球表面。

   shēn​hǎi fù​gài yī​bàn yǐ​shàng de dì​qiú biǎo​miàn.

   The deep sea covers over half of the Earth's surface.

   Source: CCMatrix

3. 我们对火星表面的了解比对深海的了解还要多。

   wǒ​men duì huǒ​xīng biǎo​miàn de liǎo​jiě bǐ duì shēn​hǎi de liǎo​jiě hái​yào duō.

   We know more about the surface of Mars than we do about the deep sea.

   Source: OpenSubtitles