3 sentences

1. 宇宙的演化是一个漫长的过程。

   yǔ​zhòu de yǎn​huà shì yī gè màn​cháng de guò​chéng.

   The evolution of the universe is a long process.

   Source: Dong Chinese Dictionary

2. 物竞天择是自然界演化的基本法则。

   wù jìng tiān​zé shì zì​rán​jiè yǎn​huà de jī​běn fǎ​zé.

   Natural selection is the fundamental law of biological evolution.

   Source: Dong Chinese Dictionary

3. 中子俘获是恒星演化过程中非常重要的反应。

   zhōng​zǐ fú​huò shì héng​xīng yǎn​huà guò​chéng zhōng fēi​cháng zhòng​yào de fǎn​yìng.

   Neutron capture is a very important reaction in the process of stellar evolution.

   Source: Dong Chinese Dictionary