3 sentences

1. 他在沙发上安静地入眠了。

   tā zài shā​fā shàng ān​jìng de rù mián le.

   He fell asleep quietly on the sofa.

   Source: Dong Chinese Dictionary

2. 他彻夜未眠。

   tā chè​yè wèi mián.

   He stayed awake all night.

   Source: Dong Chinese Dictionary

3. 蚕在蜕皮之前会停止进食，进入眠期。

   cán zài tuì​pí zhī​qián huì tíng​zhǐ jìn​shí, jìn​rù mián qī.

   Silkworms stop eating and enter a dormant stage before molting.

   Source: Dong Chinese Dictionary