mean-free path平均自由路程;平均自由通路
fission mean-free path裂变平均自由程
neutron mean-free path中子平均自由径
capture mean-free path俘获平均自由程
fast mean-free path快中子平均自由程
collision mean-free path碰撞平均自由程
diffusion mean-free path扩散平均自由程
absorption mean free path吸收平均自由程;吸引平均自由〔路〕程;吸引平均自由
collision mean free path碰撞平均自由路程;碰撞平均自由径
N（名词） the average distance travelled by a particle, atom, etc, between collisions 平均自由行程