The sizes of the repeating groups (which I'll call the period of the column, for lack of a better term) are 4, 8, 16, 32, and 64 for the five columns.

这五列的重复组（我称之为列的 period，因为没有更好的术语）的大小为 4、8、16、32 和 64。

youdao

Starting from a core molecule possessing alkenyl groups and repeating the hydrosilylation step and alkenylation step, a carbosilane dendrimer with Si-atoms as branching pointing was obtained.

从一个含有烯基的中心核分子开始，重复进行硅氢化作用和烯基化作用的过程可以获得以硅原子作为支化点的碳硅烷树形分子。

youdao

Simply repeating that civilian suffering is illegal and wrong, as many human-rights groups tend to do, will do little to change potential perpetrators, he says.

ECONOMIST: Civilians in war