neutrin

例句：

1. 1.Neutrons are particles that make up the nucleus of atoms.
   中子是构成原子核的粒子。
2. 2. Neutron stars are the remnants of massive stars that have collapsed into neutron stars.
   中子星是质量巨大的恒星坍塌后形成的遗迹。
3. 3.Neutrons are used in nuclear reactors to produce energy.
   中子在核反应堆中用于产生能量。