科学家关注与动物相关的疾病

短语讲解：

1. A new, highly pathogenic, strain of Avian Influenza known as H5N1 killed hundreds of people.

known as被认为是，被称为
例句：Radio, television, newspapers and magazines are known as the mass media.
广播、电视、报纸和杂志被称为大众传媒。

2. Over the next years, more than 9-million chickens were destroyed in an effort to stem the epidemic.

in an effort to为了
例句：They rebuilt the cinemas in an effort to reach out to the young people.
他们重建了电影院，试图吸引青年人。

3. Now scientists are concerned about the appearance of new illnesses.

be concerned about关心,挂念
例句：We are concerned about his welfare.
我们关心他的健康。

4. It's no longer a wildlife conservation issue, it's no longer a separate human issue. 

no longer不再, 已不, 不复, 再也不
例句：He was long a famous musician, but he plays no longer.
他成为有名的音乐家已很久了, 但他现在不演奏了。

5. The AIDS virus, HIV, is now known to have originated from a similar virus in African chimpanzees.

be known to为…所熟知
例句：The actor is well known to us.
我们熟知这个演员。
originate from来自…; 源于…
例句：His book originated from a short story.
他的书是根据一个短篇小说撰写的。

6. An estimated 30-million people have died of AIDS since the early 1980s.

die of死于
例句：He died of a heart attack.
他因患心脏病而死。

7. A fungus spread by the trade in amphibians has led to the extinction of about 120 species of frogs around the world.

lead to导致, 引起
例句：An ordinary cold can soon lead to a fever.
一场普通的感冒很快便会引起高烧。