And so the goal of a cladogram is to create what are called monophyletic groups.

因此，支序图的目标是创建所谓的单系群。

Second, scientists who have observed, Hans find that single lines are perfectly capable of getting enough food alone.

其次，科学家们观察发现，汉斯发现单系完全有能力单独获得足的食物。

Monophyletic would be this, yikes, would be this yellow group right here because it contains this and all of the descendants of that, that move from here.

单系的就是这个， 哎呀，就是这个黄色组， 因含了这个以及的所有后代，这些后代从这里演化而来。

And that path is represented by a single branch coming off of the tree, meaning that bryophytes are monophyletic — they share a single common ancestor and are all more closely related to each other than to any other plant group.

这条路径由一棵树上的一个分支来表示，这意味着苔藓植物是单系的——们有一个共同的祖先，彼此之间的关系比与任何其他植物群体的关系都要密切。