1·The coyotes killed a large percentage of the park's red foxes, and completely drove away the park's beavers.
土狼杀死了公园里大部分的红狐，还赶走了所有的海狸。
2·These beavers do know how to build dams, and do so if the need arises, as may occur if they are forced to relocate after felling and consuming all nearby trees.
这些海狸知道如何建造水坝，而且在有需要的时候就会这么做，比如当它们在砍伐和消耗了附近所有的树木后被迫迁移的时候。
3·Wait, I see where you are heading with this, but before we go into how European settlement affected the ecosystem, tell me this—what kind of environment do beavers live in?
等等，我明白你的意思了，但在我们讨论欧洲人的定居如何影响生态系统之前，告诉我，海狸生活在怎样的环境中？
4·It's been shaped by constraints over vast stretches of time, all of which comes down to the fact that the best foraging strategy for beavers isn't the one that yields the most food or wood.
它是由长时间的约束形成的，都指向一个事实，就是对海狸来说最好的觅食策略不是产出最多食物或木材。
5·Beavers build dams and birds make nests.
海狸筑水坝，鸟筑巢。