With each recursive step, cross products with one additional Permutation Group are formed.

伴随每个递归步骤，会形成带有一个额外置换群的向量积。

youdao

At one time, I was afraid to cross the road, watching cars drive from one laugh before the opening of what had legs, but step by step is immune.

曾经，我害怕过马路，看着一辆辆的车从面前嗤的一下开过，脚却一步都难迈出。

youdao

It is also one of the few European banks that has taken a big step in cross-border consolidation.

ECONOMIST: An unseemly rush to defend a national champion