And that feature is only found in artiodactyls.

特征只存在于类物中。

Some very early cetaceans have this ankle bone, too, which tells us that cetaceans evolved from artiodactyls.

一些非常早期的类物也有踝骨，告诉我们类物是从类进化来的。

In other words, if Ambulocetus represents the transition from land to water, then Indohyus represents the transition from artiodactyls to whales.

换句话说， 如果 Ambulocetus 代表从陆地到水的过渡，那么 Indohyus 代表从物到鱼的过渡。

Unlike Ambulocetus, it's not a member of the immediate whale family, but it shares a common ancestor with them, helping to connect today's artiodactyls.

与 Ambulocetus 不同， 它不是直系鱼家族的成员，但它与他们有共同的祖先，有助于连接今天的物。

And these comparisons showed that cetaceans are actually most closely related to a group known as artiodactyls, hoofed mammals that includes hippos, pigs, and deer.

些比较表明，类物实际上与称为类物的类群关系最密切，类物是有类哺乳物，包括河马、猪和鹿。