The moose is the world's largest deer.

驼鹿是世界上最大鹿科物。

And there is no cervine institute.

也没有鹿科物机构。

It's one of the tallest mammals in North America, and the largest of all deer species in the world: the moose.

它是北美最高哺乳物之一，也是世界上体型最大鹿科物：驼鹿。

Why would cute little deer-things end up leading a whole order of mammals to life in the deep sea?

为什么鹿科小物会引导整个哺乳物目进化到深海生活？

And there in the middle is the walking swimming whale, linking whales as we know them to tiny, cat-sized deer-things, just dipping their toes in the water for the first time.

而在中间就是步行游泳鲸，它将我们所熟知鲸目物与那些小型、猫般大小鹿科物联系起来，这些鹿科物刚刚开始把脚趾浸入水中。