中子-质子质量差
neutron proton mass difference
neutron-proton mass difference
difference
neutron-proton mass
光束质量控制
Laser beam quality control
beam quality control
光束质量诊断仪
laser beam quality analyzer
远场光束质量
beam quality in the far field
far-field beam quality
远场光束质量分布
Laser far-field distributing
高能质子-质子反应
high energy proton-proton collision