他们已经把犀牛逼到了灭绝的边缘。
居住在山区的大猩猩已濒临灭绝。
因栖息地正受到破坏这一物种已濒于灭绝。
This species has nearly died out because its habitat is being destroyed.
这些物种中的许多已经消亡或是正濒临灭绝。
Many of these species have vanished or are facing extinction.
成立这个协会是为了保护濒危物种不致灭绝。
The society was set up to preserve endangered species from extinction.
很多树种濒临灭绝。
一项行动正在展开来拯救一个鳄鱼种类使其免遭灭绝。
An operation is beginning to try to save a species of crocodile from extinction.
科学家正试图把已灭绝动物的特征与现存类似动物相比较。
Scientists are attempting to compare features of extinct animals with living analogues.
由于森林砍伐，很多树种濒临灭绝。
Hundreds of tree species face extinction because of deforestation.
它们将成为第二大灭绝的鸟类。
They will tum out to be the second-largest species of birds to become extinct.
一个物种一旦灭绝就永远消失了。
每一次大灭绝可能都有不同的原因。
是什么导致了如此高的物种灭绝率？
全球变暖的后果之一是物种灭绝。
灭绝是一个很难理解的概念。
这一时期的灭绝并不彻底。
在研究灭绝的动物时，总要做一些猜测。
There's always some guesswork when studying extinct animals.
众所周知，熊猫濒临灭绝。
As is known to all, the panda is in danger of becoming extinct.
让我们以现在已经灭绝的美洲猎豹为例。
在这种假设下，大灭绝的发生是非常突然的。
The mass extinction would have occurred very suddenly under this hypothesis.
在这些濒危动物灭绝之前，我们必须保护它们。
We must protect these endangered animals before they become extinct.
这在导致整个鲑鱼种群灭绝的案例中最为明显。
This is most evident in cases where it results in the extinction of entire salmon populations.
一旦森林覆盖开始增加，灭绝的速度应该变小。
Once forest cover does start increasing, the rate of extinction should dwindle.
许多物种在地质上很短的时间间隔内灭绝的情况称为大灭绝。
Cases in which many species become extinct within a geologically short interval of time are called mass extinctions.
濒临灭绝物种的名单中列有将近600种鱼。
专家们说如果那座小岛得不到保护，此次泄露有可能使该海湾地区的海龟灭绝。
Experts say if the island is not protected, the spill could wipe out the gulf's turtle population.
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