And in Bridge Creek, the fish flourished—despite the view held by some that beaver dams are bad for fish.

虽然有观点认为海狸水坝对鱼类有害，不过在Bridge Creek，鱼类大量繁殖起来。

And beaver dams do just that.

海狸水坝就是这样做的。

Would you use a robot to build a beaver dam?

你会用机器人建造海狸水坝吗？

And just like their manmade counterparts, beaver dams slow floodwaters.

就像他们的人造水坝一样，海狸水坝减缓了洪水。

A beaver dam can be anywhere from one meter to 850 meters long.

海狸水坝的长度从 1 米到 850 米不等。

Lewis and Clark found massive numbers of Pacific salmon and steelhead trout there, swimming among the beaver dams scattered across the Columbia River Basin.

刘易斯和克拉克发现，大量的太平洋鲑鱼和硬头鳟在哥伦比亚河流域的海狸水坝中游来游去。

They would leap on the trunk of a tree that lay near a beaver dam, and would push one another off into the water.

它们在自己建造的水坝附近嬉戏，大家都想跳过一根树干，于是彼此推搡着想让另外一个掉进水里。

There's certainly no shortage of neighbors— some regions have as many as 40 beaver dams per kilometer of stream.

这里当然不乏邻居——一些地区每公里溪流有多达 40 个海狸水坝。

So, because both species are builders, some experts think the very first beaver dams and lodges might've been built around this time.

因此， 由于这两个物种都是建设者，一些专家认为最早的海狸水坝和小屋可能是在这段时间建成的。

Beaver dams come in several shapes, but our beaver opts for a concave dam to dissipate the forceful flowing water, and layers in large rocks to reinforce areas where water flows the strongest.

海狸水坝有多种形状， 但我们的海狸水坝选择凹形水坝来驱散强劲的流动水，并在大岩石中分层以加固水流最强的区域。