Aim To study the effects of chitosan-bismuth on experimental rat ulcer models.

Brass, copper, stainless steel, bismuth, and lead are all suitable.

黄铜 、 铜 、 不锈钢 、 铋及铅都是适合的.

He later was called a bison.

后来,人们叫它美洲野牛.

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

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.

Ms. Foerstel says bison always been part of the American landscape. Mr.

福斯提尔女士说野牛是美国独特风景的一部分.

All the bison have been protected, and the publication of bison system diagram nationality.

所有的野牛都被保护起来, 并且出版了野牛系统图籍.

They stuck a bison with spears.

他们用长矛刺死了一头野牛.

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

野牛制造的废物也不再渗进泥土改善土壤了.

There we saw American bison, elk, mountains, hot springs, and the Old Faithful geyser.

在那儿我们看过北美野牛, 麋, 山, 温泉, 和“老忠实”喷泉.

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

曾经有上百万的美洲野牛徜徉在北美大地上, 而今它们已不复存在.

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.