科学家宣布又一动物疾病被根除

短语讲解：

1. It played a role in the fall of Rome, the French Revolution and paved the way for the colonization of Africa, historians say.

play a role in在…扮演一个角色，在某方面起作用
例句：Woman used to play a passive role in a marriage.
妇女过去在婚姻中常常扮演顺从被动的角色。
pave the way for　为……铺平道路, 为…做好准备
例句：Their economic policy pave the way for industrial expansion.
他们的经济政策为工业发展铺平了道路。

2. If you could imagine that you are an owner of 100 animals - a milking herd - by the end of the week, you would have zero, it would go so fast through the population,” said the UN Food and Agriculture Organization's Animal Health Service Chief, Juan Lubroth.

by the end of到…为止
例句：He had finished his great works by the end of 1980.
到1980年底, 他已完成了他的巨著。

3. And the effects were devastating for those who depended on cattle for their livelihoods.

depend on依赖, 依靠
例句：All living things depend on the sun for their growth.
万物靠太阳生长。

4. “Animals move from one region to another, and very often across national boundaries," said the Inter-African Bureau for Animal Resources’ Henry Wamwayi. "

national boundaries 国界
例句：The new national boundaries of that country were fixed after the war.
这个国家的新国界是战后划定的。

5. But because wild animals also carry the disease, it took several years of intensive worldwide surveillance to be sure rinderpest was truly gone.

wild animals野生动物
例句：Many wild animals prowl at night .
许多猛兽在夜间出没觅食。

6. “By having had a good vaccine and eradicating rinderpest, I think, from a food security point of view, this is a tremendous accomplishment,” he said.

point of view 观点
例句：I understood your point of view.
我理解你的观点。

7. Rinderpest becomes only the second disease besides smallpox to be found nowhere on earth but frozen away in a few laboratory vials, making the world a little safer for cattle and the people who depend on them.

on earth世界上
例句：He is ready to do anything on earth to better his fortunes.
他准备在世上干点什么以便交上好运。