translation.en: But a beaver also needs things. And that having it on either side means that we can link it together, that we can create the network of the habitat relationships for these species.
translation.zh: 但是海狸本身也需要某些东西。所以无论 把它们放在捕食者或被捕食者的一边，我们都能把它们连接起来。 于是，我们有了 这些物种栖息关系的网络。