英语翻译Why did the chicken cross the road?To get to the other s

英语翻译
Why did the chicken cross the road?To get to the other side.
Most people know this joke.But recently,some people have been much more concerned with how the grizzly bear and mountain lion can cross the road.
Millions of animals die each year on U.S.roads,the Federal Highway Administration reports.In fact,only about 80 ocelots,an endangered wild cat,exist in the U.S.today.The main reason?Roadkill.
"Ecopassages" may help animals cross the road without being hit by cars.They are paths both over and under roads."These ecopassages can be extremely useful,so that wildlife can avoid human conflicts," said Jodi Hilty of the Wildlife Conservation Society.
But do animals actually use the ecopassages?The answer is yes.Paul Beier of Northern Arizona University found foot marks left by mountain lions on an ecopassage that went under a highway.This showed that the lion used the passage.
Builders of some ecopassages try to make them look like a natural part of an area by planting trees on and around them.Animals seem to be catching on.Animals as different as salamanders and grizzly bears are using the bridges and underpasses.
The next time you visit a park or drive through an area with a lot of wildlife,look around.You might see an animal overpass!

为什么这些鸡要穿过马路到对面去?
大多数人知道这则笑话.但现在,一些人非常关心的的是灰熊和美洲狮怎样才能穿过马路.
根据联邦公路管理局的报告,每年都会有上百万的动物死在美国的公路上.事实上,现在美国仅存大约80只小豹猫（一种濒危的野猫）.主要原因是什么?公路致死.
“生态通道”可以是地面的也可以是地下的通道.这些通道也许能够帮助动物们穿过马路而不至于被车撞.“这些生态通道非常有用.这样野生动物就可以避免与人的冲突.”野生动物保护协会的Jodi Hilty 说.
但是动物们真正地使用了生态通道吗?答案是肯定的.北亚利桑那州大学的Paul Beier 在一条往高速公路下面通过的生态通道发现了美洲狮留下的足迹.这表明有狮子使用了这条通道.
一些生态通道的建设者还在两边及周围种了树,为了尽可能地使这些通道看起来像自然的地域.动物们似乎慢慢理解了.各种不同的动物像蝾螈和灰熊都使用了这些生态通道.
下次你去公园或是驾车驶过野生动物繁多的地方,这时候你往周围看一下,说不定就可能看到动物们专用的天桥!