mesomeric ion

例句：

1. 1.Neutrons are the building blocks of matter.
   中子是物质的构成基石。
2. 2.The neutron star is a type of compact object that contains a neutron star.
   中子星是一种紧凑型天体，含有中子星。
3. 3.Neutron stars are believed to be the remnants of massive stars that have collapsed into a dense core.
   中子星被认为是巨大恒星崩溃后形成的密集核心的遗迹。