But this new discovery had enough clues to figure it out, like those ankle joints.

但是这个新发现有足够的线索来弄清楚，比如那些踝关。

It also shared features with dinosaurs and crocodiles — like similar skull features as dinosaurs and the same kind of ankle joint as crocodiles.

它还恐龙和具有相同的特征——比如恐龙相似的头骨特征和相同的踝关。

And they had long fingers and toes that were good for grasping onto branches and tree trunks, with mobile ankle joints to help them hang on.

的手指和脚趾很长， 很适合抓住树枝和树干，踝关灵活， 可以帮助坚持下去。

If I couldn't use an ankle joint to achieve the range of motion that I required to mount the curb, I would have to use a different joint, like my hip.

如果我没法用踝关做出足够幅度的动作来登上马路牙子，我就得用别的的关，比如我的髋关。

But researchers hypothesize that it has to do with the pressure placed on the small bones of the wrist and ankle joints when an animal has to do more with its limbs than just paddle.

但研究人员推测，当动物需要用四肢做更多事情而不仅仅是划桨时，这施加在腕关和踝关小骨头上的压力有关。