We’re still learning how these simple species became complex beings… and eventually, you.

我们仍在学习这些简单的物种如何变成复杂的生物… … 最终，你。

We're still learning how these simple species became complex beings… and eventually, you.

我们仍在了解这些简单的物种如何变成复杂的生物… … 最终，你。

The simplest species of clothing, the skins of animals, require somewhat more labour to dress and prepare them for use.

最简单的衣服， 动物的皮，需要更多的劳动来穿着和准备使用。