3 sentences

1. 中子和质子都是基本的粒子。

   zhōng​zǐ hé zhì​zǐ dōu shì jī​běn de lì​zǐ.

   Neutrons and protons are both fundamental particles.

   Source: Dong Chinese Dictionary

2. 原子核是由质子和中子这两种核子构成的。

   yuán​zǐ​hé shì yóu zhì​zǐ hé zhōng​zǐ zhè liǎng zhǒng hé​zǐ gòu​chéng de.

   The atomic nucleus is composed of two types of nucleons: protons and neutrons.

   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