And a century ago, the bison were reduced to barely 1,000.

一百前，牛的数量曾锐减至不到一千。

Or capitulating to bison at the entrance to Yellowstone.

或者黄石公园入口处向牛投降。

The whole idea is to sort of emulate the bison in olden days.

整个想法模仿古代的牛。

The park is now a protected area for bison.

该公园现牛保护区。

Most of the wild animals must be watched from a distance, especially the bison.

大部分生动物必须远距离欣赏，尤其牛。

We do have live bison in San Francisco, if you haven't seen it.

我们旧金山确实有牛, 不过你可能没见过。

But, as her supervisor at Oxford pointed out, no one was studying bison.

但，正如她牛津大的导师所指出的那样，没有人研究牛。

In eastern Europe, you may see the rare Euroasian Lynx and the European bison.

东欧，你可能会看到罕见的欧亚猞猁和欧洲牛。

Right now we're working to establish a herd of genetically pure bison at the zoo.

“目前我们正致力于动物园里培育纯种基因的牛群。

Thomas is involved in efforts with the zoo's current herd of bison.

托马斯参与了动物园当前的牛群繁育工作。

The wild horses came from Britain's Exmoor National Park, while European bison came from Poland.

这些马来自英国埃克斯穆尔国家公园，而欧洲牛来自波兰。

The pronghorn lived alongside other grazers still around today, including bison.

叉角羚曾经与像今日仍旧存活的牛那样的其他食草动物共伴而生。

Just as cows, sheep and bison roam in herds today, so, too, did plant-eating dinosaurs.

就像现成群行动的牛、羊和牛那样，食草恐龙当也如此。

As the bison quickly vanished from the landscape, cattle filled their place.

随着北美牛快速地从大陆上消失，家牛取代了他们的位置。

The bison in Yellowstone injure far more people than do the grizzly bears.

黄石公园的牛比灰熊伤的人要多得多。

Just like cows, sheep and bison roam in herds today, so, too, did plant-eating dinosaurs.

就像今天的奶牛、绵羊和牛成群结队地游荡一样，食草恐龙也如此。

The bear's attention is clearly on the bison.

短面熊的注意力显然牛身上。

Now 82 tribes across the U. S. have more than 20,000 bison in 65 herds.

目前全美 82 个部落 65 个牧群共有 2 万多头牛。

So the beaver will go the way of the bison and the American Indian.

所以海狸会走牛和美洲印第安人走过的路。

In summer, bison roamed freely, almost continuously cropping the abundant green grass.

夏季，美洲牛四处漫步享用着取之不尽的大片青草。