neutron poor isotope

例句：

1. 1. Neutrons are the building blocks of matter.
   中子是物质的构成基石。
2. 2. Neutrons have a strong force that binds protons together.
   中子拥有一种强大的力量，将质子紧紧相连。
3. 3.The neutron star is a very dense and compact object in space.
   中子星是一种在太空中非常密集且紧凑的天体。