3 sentences for 昼夜 (zhòu​yè — day and night)

1. 逝者如斯夫！不舍昼夜。

   shì​zhě rú sī fú! bù shě zhòu​yè.

   Time flows away like this, never ceasing day or night.

   Source: Dong Chinese Dictionary

2. 这里的昼夜温差很大。

   zhè​lǐ de zhòu​yè wēn​chā hěn dà.

   The temperature difference between day and night here is very large.

   Source: Dong Chinese Dictionary

3. 在古代，人们将一昼夜划分为十二个时分。

   zài gǔ​dài, rén​men jiāng yī zhòu​yè huà​fēn wéi shí'èr gè shí​fēn.

   In ancient times, people divided a full day into twelve periods.

   Source: Dong Chinese Dictionary