脉冲中子－中子测井仪
pulsed netron-netron logger
热中子中毒
thermal neutron poisoning
poisoning
thermal-neutron
质子(中子)分离能
proton(neutron) separation energy
中分子毒物
Middle molecular toxins
Middle molecular substances
中子—中子反应
neutron-neutron re-action
中子中子碰撞
collision between neutrons