neutron single-particle energy

例句：

1. 1. Neutrons are the fundamental particlesthat make up matter.
   中子是构成物质的基本粒子。
2. 2. The neutron staris a type of compact object that containsa neutron star.
   中子星是一种紧凑的天体，包含一个中子星。
3. 3. Neutron stars are believed tobe the remnants ofmassive stars that have collapsed into aneutron star.
   中子星被认为是大型恒星崩溃后形成的，这些恒星已经变成了中子星。