The mountain gorilla is on the verge of extinction.
居住在山区的大猩猩已濒临灭绝。
The loggers say their jobs are faced with extinction because of declining timber sales.
樵夫们说他们的工作因不断下降的木材销售而面临消亡。
This period of extinction wasn't comprehensive.
这一时期的灭绝并不彻底。
One consequence of global warming is extinction.
全球变暖的后果之一是物种灭绝。
One theory is that they were hunted to extinction by humans.
一种理论是，它们是由于人类的猎杀而灭绝的。
The animals were ruthlessly hunted to the verge of extinction.
这些动物由于遭到无情的捕猎而濒于灭绝。
The aye-aye's striking appearance may end up causing its extinction.
狐猴引人注目的外表可能最终导致了它的灭绝。
This is most evident in cases where it results in the extinction of entire salmon populations.
这在导致整个鲑鱼种群灭绝的案例中最为明显。
The rates of extinction happening today are as great as the rates during these mass extinctions.
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。
If you think about it though, the core problem with this sixth mass extinction is human interference.
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。
I am sure you're all aware of the worrying situation with a large number of species facing extinction.
我相信你们都意识到了大量物种面临灭绝这个令人担忧的情况。
Scientists have linked the mass extinction at the end of the Cretaceous with a meteorite impact on Earth.
科学家将白垩纪末期的大灭绝与地球上的陨石撞击联系起来。
Many theories have been put forward for the extinction of the dinosaurs, but most of them can be dismissed.
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。
The biggest was the Endangered Species Act of 1973, which protects imperiled animal species from extinction.
其中最著名的是1973年的《濒危物种法案》，该法案旨在保护濒临灭绝的动物物种。
One is to help prevent the extinction of some endangered megafauna by providing new refuges, new habitats for them.
一个方法是通过提供新的避难所、新的栖息地来帮助防止一些濒危巨型动物的灭绝。
Already well over 400 of the total of 6,800 languages are close to extinction, with only a few elderly speakers left.
在总共六千八百多种语言中，有超过四百种语言濒临消亡，这些语言只剩下极少数老人在使用。
The Cambrian explosion involved rapid evolutionary diversification, followed by the extinction of many unique animals.
寒武纪大爆发涉及迅速的进化分化，随之而来的是许多独特动物的灭绝。
Many species of plants and animals are in danger of extinction, so it's high time that we take actions to protect them.
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。
The only clear explanation is that humans caused the extinction of the various mammal species through excessive hunting.
唯一明确的解释是人类的过度捕猎导致了各种哺乳动物的灭绝。
The fossil record suggests that there was an abrupt extinction of many plants and animals at the end of the Mesozoic era.
化石记录表明，在中生代末期，许多动植物突然灭绝。
Airborne soot and dirt from the impact blanketed Earth, inhibiting photosynthesis and triggering mass extinction of species.
撞击产生的烟尘和灰尘覆盖了地球，抑制了光合作用，引发了物种的大规模灭绝。
This break in Earth's history is marked by a mass extinction, when as many as half the species on the planet became extinct.
地球历史上的这次重大灾难以物种的大量消亡为标志；当时，地球上多达一半的物种都灭绝了。
Some scientists hypothesize that the extinction of the dinosaurs resulted from the effects of an asteroid collision with Earth.
一些科学家假定，小行星撞击地球导致了恐龙的灭绝。
For instance, if it hadn't been for the extinction of the dinosaurs, we mammals would never have had an opportunity to flourish.
例如，如果没有恐龙的灭绝，我们这些哺乳动物就不会有机会繁荣昌盛。
Sea turtles, polar bears and giant pandas are just some of the thousands of animals in this world that are at risk of extinction.
海龟、北极熊和大熊猫只是世界上成千上万濒临灭绝的动物中的一部分。
Roughly 250 million years ago, in the worst series of mass extinction in Earth's history, almost all species of life simply vanished.
大约2.5亿年前，在地球历史上最严重的一系列大灭绝中，几乎所有的生命物种都消失了。
Given how much ink has been spilled on the extinction of the dinosaurs, it's a wonder that even more hasn't been devoted to megatauna.
恐龙灭绝受到巨大关注，但却没有多少人关注巨型动物，这让人感到诧异。
However, if safe areas like those prey animals have in the wild are provided, the prey population drops to low level but not extinction.
然而，如果能给被捕食的动物提供一些它们在野外时那样的安全区域，它们的数量会降到很低但不灭绝。
One thing he found was that humans didn't necessarily have to kill these animals in great numbers in order to nudge them toward extinction.
据他发现，人类不必大量捕杀这些动物，就可以使它们走向灭绝。
Following each mass extinction, there is a sudden evolutionary burst as new species develop to fill the ecological niches opened by the event.
在每一次物种大灭绝后，都有一次突然的进化爆发，因为会有新物种出现来填补灭绝创造的生态位。
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