If frogs ever become endangered, we know why.
如果青蛙可能濒临灭绝的话，我们知道是什么原因了。
A species can become endangered for different reasons.
一个物种濒临灭绝危险有多种不同的原因。
Many species have become endangered and extinct because of natural and factitious factors.
各种人为干扰和自然因素促使大量物种走向濒危和绝灭。
There once were a lot of zebras in many parts of Africa, but they have become endangered in some areas because of hunting.
在非洲的许多地区都曾经有大量的斑马，但是由于猎捕，一些地区的斑马已濒临灭绝。
But there "s more to worry about than the impending storm, and their lives become endangered, by something that" s not normal.
但更担心比迫近的暴风雨，和他们的生活成为濒临绝种的东西，是不正常的。
If the new species is too strong or USES too much of the resources in the habitat, some of the original species may become endangered.
如果新的物种太强大，占用过多聚居地的资源的话，一些原始的物种就会受到损害。
Any preserves we set up to protect endangered species may become useless as the species are forced to migrate along with their natural homes.
我们为保护濒危物种而建立的任何保护区都可能变得毫无用处，因为这些生物被迫随着它们的自然栖息地迁移。
We must protect these endangered animals before they become extinct.
在这些濒危动物灭绝之前，我们必须保护它们。
Brown pelicans, which were just taken off the federal endangered species list last year, have become covered in oil.
褐鹈鹕，这是去年才被联邦列入濒危物种的一种鸟类，目前绝大大部分受到本次石油泄漏的危害。
Some American collectors are concerned that the trade in materials from endangered animals will become more restricted.
有些美国藏家担心，这些出自濒危动物的材质会严加限制交易。
Human beings have become the farmland, forest new cities and roads occupied animal habitats, many animals were killed, leading to the endangered animals.
人类把森林变成了耕地，新的城市和道路占据了动物的栖息地，许多动物遭到杀害，导致动物们濒临灭绝。
So protecting plant resources and rescuing the rare and endangered plants have become attention hotspot for international society.
因此，保护植物资源，拯救珍稀濒危植物已成为国际社会关注的热点。
At low water, trapped shrimps and fish become easy prey, a life saver for these endangered birds.
在浅水中被困的鱼虾易于捕食，成为了这些濒危鸟儿们的救命粮草。
My dream is to become an endangered species specialist and help save a kind that's dying off slowly.
我的梦想是成为濒危物种专家，帮助拯救正在缓慢灭绝的物种。
The giant panda has become an endangered species.
大熊猫已成了一种濒临灭绝的动物。
The giant panda has become an endangered species.
有些物种由于人们的无和而灭绝。
This theory has great practical and theoretic significance in contemporary times when the relationship between human and nature is endangered, and ecological environments become worse.
马克思关于人与自然的理论，在人与自然关系日趋危机，生态环境日益恶化的当代，具有重大的理论和实践意义。
The spread of the disaster caused by longicorn beetle has not only endangered forestry, but also become a menace to the Yellow River agriculture which largely depends on ecological environment.
近年来，宁夏天牛蔓延成灾，危及林业，对依托于生态环境的黄河农业已构成威胁。
This rare bird has become an endangered species.
这种珍禽已成为濒临灭绝的物种。
For many Americans, being behind the wheel is like their natural habitat. But if they don't drive carefully, they can become an endangered species.
对许多美国人而言，坐在方向盘后面就像是他们自然栖息之处，不过，如果他们开车不认真的话，他们可就会变成面临危险的动物了。
For many Americans, being behind the wheel is like their natural habitat. But if they don't drive carefully, they can become an endangered species.
对许多美国人而言，坐在方向盘后面就像是他们自然栖息之处，不过，如果他们开车不认真的话，他们可就会变成面临危险的动物了。
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