What makes those creatures survive the extinction event is a mystery.
这些生物怎么活过大灭绝的不得而知。
An extraterrestrial impact is most closely linked to the Cretaceous extinction event.
天外来客对地球的撞击与白垩纪的物种灭绝事件有着最为密切的联系。
The mass extinction event killed off the dinosaurs and many other animal and plant species.
中找到了元素铱岩层，而这通常会被发现于小行星中。 这次灭绝事件杀光了恐龙以及许多其他动植物物种。
This is further evidence that we are well on the way to the next great extinction event.
这也进一步证明我们正在走向下一次大灭绝的厄运。
Of course, humanity is currently setting off the sixth mass extinction event in Earth's history.
当然，人类正在引发地球历史上第6次物种大灭绝。
The last extinction event, 11 million years ago, saw 10 per cent of the Earth’s inhabitants wiped out.
上一次大灭绝事件是在1100万年前发生的，当时地球上10%的居住者遭到灭绝。
Overall, each mass extinction event has rid the planet of up to 96 percent of its species each time.
总的来说，每次大规模的灭绝事件都使地球减少96%的物种。
Continental Cretaceous-Paleogene strata are important information carriers of this extinction event.
陆相地层是恐龙绝灭等事件信息的重要载体。
As such, these puny foraminifera serve as very distinct tags of when the K-T extinction event started.
因此，当K-T灭绝事件开始时这些微小的有孔虫充当十分鲜明的标签。
Earth is experiencing its sixth mass extinction event, species winking out of existence before we even know them.
地球正在经历他的第六次大灭绝事件，许多物种甚至在我们认知它之前就飞速地消逝了。
Prior to this find, scientists were unsure whether such creatures died out in an extinction event during an earlier period known as the Cambrian.
在此之前发现，科学家们不能确定这种生物灭绝事件中死亡一出在一个名为的寒武纪早期。
Then, 25 million years after that, in what’s known as the Triassic-Jurassic extinction event, the crurotarsans and at least half of all other animal species vanished.
这次撞击2500万年后，也就是三叠纪-侏罗纪灭绝事件中，crurotarsan和其它至少一半的动物都灭绝了。
Ash from burning coalfields, sparked by massive volcanic eruptions, may have added to the volley of crises that led to the biggest extinction event in Earth's history.
由大规模火山喷发引起的煤田燃烧产生的烟尘，可能是导致地球历史上最大的生物灭绝事件危机的并发原因。
The Permian extinction—the worst extinction event in the planet\'s history—is estimated to have wiped out more than 90 percent of all marine species and 70 percent of land animals.
二叠纪的生命大灭绝，是我们这个星球上最可怕的一次物种灭绝，海洋的90%的生命以及陆地上70%的生命都消失了。
The Permian extinction-the worst extinction event in the planet's history-is estimated to have wiped out more than 90 percent of all Marine species and 70 percent of land animals.
二叠纪的生命大灭绝，是我们这个星球上最可怕的一次物种灭绝，海洋的90%的生命以及陆地上70%的生命都消失了。
Earth is experiencing its "sixth great extinction event" with disease and human activity taking a devastating toll on vulnerable species, according to a major review by conservationists.
根据自然资源保护者的重要回顾报告，地球正经历“第六次大灭绝事件”，因为疾病和人类活动正在令脆弱的物种遭受到灾难性打击。
The eruption is one of the likely causes of the Permian-Triassic mass extinction event, in which 95% of Marine species and many terrestrial vertebrates, insects and plants died off.
这次喷发是Permian -Triassic绝种事件的可能原因之一，约95%的海洋物种，陆生脊椎动物，昆虫和植物在这次绝种事件中灭绝了。
The benthic extinction event (BEE) and larger foraminifera turnover (LFT) during the Paleocene-Eocene transition constitutes an important step in Paleogene larger-foraminifera evolution.
该时期的底栖大有孔虫的绝灭(BEE)以及演替(LFT)在古近纪底栖大有孔虫演化过程中起着非常重要的作用。
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。
Although not one of the "big five" mass extinctions, the mid-Permian extinction has long been considered an important, if puzzling, event.
尽管不是五次物种大灭绝之一，二叠纪中期的物种灭绝依然被长期作为谜一般的事件受到重点关注。
Given the possibility of an imminent near-ELE (extinction level event) 19, a cynic would argue that it's a smart use of our tax dollars to ensure that at least some humans survive20.
鉴于临近的近乎灭绝级事件[19]可能发生，愤世嫉俗者会认为用我们的税款来确保至少几百人存活下来是聪明的[20]。
The third such event was followed by toad extinction.
第三次这样的现象之后随之而来的就是这种蟾蜍的灭绝。
When a shower of massive meteors threatens an extinction level event on Earth, the world's greatest minds devise a dangerous plan that will take the planet off its axis in order to avoid the impact.
当大规模的流星淋浴威胁着地球上的生物大灭绝级别的事件，是世界上最伟大的头脑想出一个危险的计划，将采取关闭星球的轴线，以避免撞击。
Yangzonghai event is more a extinction accident of biotic population then merely a environmental incident, which caused from the immoralism of human being for the animals right.
阳宗海事件不仅是一次环境污染事故，更是一起生物物种的灭绝事件，起因是人类对动物生命安全的漠视。
The black unit including a biotic extinction was caused by oceanic anoxic event. Crisis that deepwater keeled foraminifera encountered represents a ferocious anoxia in deep marine environment .
黑层段是大洋缺氧造成的结果，生物大量灭绝，深层水具旋脊有孔虫的所遭受的危机反映出当时海洋深层水体严重缺氧的特征；
The mass extinction of terrestrial dinosaurs is the most important evolutionary event across the Cretaceous-Paleogene boundary.
陆生恐龙的绝灭是白垩系-古近系界线事件中最引人注目的。
The mass extinction of terrestrial dinosaurs is the most important evolutionary event across the Cretaceous-Paleogene boundary.
陆生恐龙的绝灭是白垩系-古近系界线事件中最引人注目的。
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