似乎最后一个是后来建造的，而前六组是更古老时代的遗迹。

It seems that the last is a later development while the first six groups show the relics of an older system.

youdao

其他的八个小组中，有六组只有一支。

six of the other eight groups only contained one.

youdao

它们还有六组眼睛，聚生在其钟状物的四周。

They also have eyes grouped in clusters of six on the four sides of their bell.

youdao