At one time millions of bison roamed the plains of North America. Now they are gone.

Reindeer receded northward and eastward, and bison and horse followed.

驯鹿向北方和东方撤退, 野牛和马也随之而去.

Bison dot a Yellowstone snowscape, some sweeping the drifts aside with their heads to uncover vegetation.

黄石公园雪景上点缀著一些野牛.有些正埋头刨出被盖住的植物.

And also they followed the bison.

他们还追杀野牛.

Bison were killed for their meat.

他们杀野牛,吃野牛肉.

This is Appa, my flying bison.

这是阿帕, 会飞的野牛阿帕.

Thus one simple fact a change in the number of bison.

这样一个简单的事实---野牛数量的变化.

Each bottle contains a single blade of bison grass.

每个瓶子都装有一片野牛草.

While early settlers had killed bison for food.

早期的殖民者只是以杀野牛为食.

The European bison ( Bison bonasus ) having a smaller and higher head than the North American bison.

欧洲野牛一种比北美野牛的头小且高的欧洲野牛 ( 欧洲野牛野牛属 )

American bison are very large.

美洲野牛非常巨大.

Now bison herds have increased to the hundreds of thousands.

现在,野牛群又增加数以百计千计的数量.

European bison having a smaller and higher head than the North American bison.

欧洲的野牛,其头比美洲野牛的小且高.

Bison waste no longer fell on the ground to improve to soil.

地上不再有野牛的粪便来改良土壤了.

They killed the bison , cut off the skins and left the bodies behind to rot.

他们把野牛杀死剥皮,尸体就任其腐烂.

An animal ( B. bonasus ) of Europe, similar to but somewhat smaller than bison; a wisent.

欧洲野牛欧洲一种动物 ( 欧洲野牛野牛属 ), 和野牛相似,但小于野牛; 珍野牛.

Hunting is permitted to keep the bison population down , and limit the bisons'movements.

允许猎杀是为了限制野牛的数量和活动区域.

They are also home to various wildlife, including bison, elk , coyotes, and prairie dogs.

它们也是各式野生动物的家乡, 包括北美野牛 、 美洲赤鹿 、 郊狼及草原土拨鼠.

In the year 1700, about 60 million bison wandered freely in North America.

在1700年约有6000万头野牛在北美无拘无束地活动.

Large herds of bison used to live on the plains of North America.

大群的野牛过去曾生活在北美大草原上.

a herd of bison

一群野牛