他们已经把犀牛逼到了灭绝的边缘。
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.
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.
让我们以现在已经灭绝的美洲猎豹为例。
我们都知道熊猫是一种濒临灭绝的物种。
We all know that panda is a species that is on the edge of extinction.
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.
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.
结果，世界上的森林正面临着逐渐灭绝的处境。
As a result, the world's forests are now facing gradual extinction.
一种理论是，它们是由于人类的猎杀而灭绝的。
One theory is that they were hunted to extinction by humans.
为什么科学家们想要了解更多关于恐龙灭绝的信息？
Why did scientists want more information about the dinosaur extinctions?
如果你仔细想想，这第六次大灭绝的核心问题是人类的干扰。
If you think about it though, the core problem with this sixth mass extinction is human interference.
多种动植物濒临灭绝的危险，所以我们必须行动起来保护它们。
Many species of plants and animals are in danger of extinction, so it's high time that we take actions to protect them.
联邦政府正在把管理鸟类的责任交给那些同样是把鸟类推向灭绝的行业。
The federal government is giving responsibility for managing the bird to the same industries that are pushing it to extinction.
研究人员要求五年级学生和大学生制定一个保护秃鹰免于灭绝的恢复计划。
The researchers asked fifth graders and college students to create a recovery plan to protect bald eagles from extinction.
人们对恐龙灭绝的传统解释感到不满，导致了一个令人惊讶的发现，转而引发了新的假设。
Dissatisfaction with conventional explanations for dinosaur extinctions led to a surprising observation that, in turn, has suggested a new hypothesis.
盖格尔和她的同事们研究了3200年前的骨头化石，这些骨头属于一种已经灭绝的叫做欧洲野牛的种类。
Geigl and her colleagues looked at 3200-year-old fossil bones belonging to a single individual of an extinct cattle species called an aurochs.
有些种类甚至面临灭绝的危险。
公园里的麋鹿有灭绝的危险。
给你当地的环境保护中心写封信，表达你对动物迅速灭绝的感受。
Send a letter to your local environment protecting center and show how you feel about the quick extinction of animals.
得知穿山甲正面临灭绝的危险，兰德勒迅速决定采取行动来保护它们。
Knowing that pangolins are facing the danger of dying out, Landon quickly decided to take action to protect them.
濒临灭绝的亚洲象在中国享有一级保护，与大熊猫的保护级别一样。
The endangered Asian elephant enjoys Class-A protection in China, the same level as the giant panda does.
在许多国家，大象已经和平地生活了数千年，但它们仍然面临着彻底灭绝的危险。
Elephants are still in danger of disappearing completely from many countries where they have lived peacefully for thousands of years.
这些活动使那些濒临灭绝的语言有了活力。
一百万年前，我们基本上是濒临灭绝的物种。
A million years ago, we were essentially an endangered species.
应该通过法律保护熊猫。否则，他们一定会灭绝的。
Laws should be passed to protect pandas. Otherwise, they are certain to die out.
最近，濒临灭绝的地中海僧海豹出现了惊人数量的死亡。
An alarming number of Mediterranean monk seals, an endangered species, have recently died.
现今物种灭绝发生的速度和这些大规模灭绝的速度一样快。
The rates of extinction happening today are as great as the rates during these mass extinctions.
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.
人们提出了许多关于恐龙灭绝的理论，但大多数都是不成立的。
Many theories have been put forward for the extinction of the dinosaurs, but most of them can be dismissed.
无人机可以秘密观察野生动物的数量，特别是濒临灭绝的动物。
Drones can watch secretly on populations of animals in the wild, especially endangered ones.
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