transverse expansion meaning in English

横膨胀

We thus discuss an approach to study the early partonic collectivity in high energy nuclear collisions . it shows that in high energetic nuclear collisions at rhic energies , there exists very strong transverse expansion , which becomes stronger with increasing colliding centrality
我们将会看到在rhic能量下的高能重离子碰撞中，存在很强的横向扩张运动，并且随着碰撞中心度的增大而变得更加激烈。
The transverse expansion origins in early stages , but mainly develops and finishes during the late stage of the colliding . for those heavier particles , such as j / , e , and etc . , becuase of their smaller hadronic cross section , they rarely participate the final state hadronic re - scattering , and depart the system much earlier . their transverse expansion maybe is the result of the cumulative collective effect during the early partonic stage
这种横向扩张起源于碰撞的初始阶段，但是主要是在碰撞的后期完成，而一些重的粒子，如j 、和，由于具有较小的强子散射截面，几乎不参与末态强子的再散射，较早的离开碰撞系统，它们所表现出来的横向扩张运动可能是来自碰撞初期部分子阶段的部分子的集体效应的累积结果。