However, the invasion of the so-called elpistostegalians—distant relatives of the coelacanth—"got wiped out by these extinction events, " McGhee explained.
但是，腔棘鱼的远亲elpistostegalians（译注：大概是一种爬上陆地的古鱼，没找到对应的中文）向陆地进发的努力“被这次大灭绝毁于一旦，”McGhee 解释说。
But research is uncovering how these extinction events dictated the fate of life on this planet-for instance, determining which animals first crawled onto land and which ruled the oceans.
但是，科学研究正在揭示这几次大灭绝如何改变地球生物的命运——比如，决定了首先出现在陆地的动物和统治海洋的生物。
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。
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。
Many of these species have vanished or are facing extinction.
这些物种中的许多已经消亡或是正濒临灭绝。
If we carry on the way that we are, we're looking at a really high risk of extinction for some of these shark species within the next few decades.
如果人类继续这样的捕杀行为，那么这些鲨鱼种群在几十年内灭绝的风险将相当高。
The optical and infrared data also measured the extinction in these molecular gas clouds.
光学和红外数据也记录了分子气云的消亡。
A mere 5 per cent of the global population speak the rest and two thirds of these lingos are in danger of extinction.
仅有5%的人说剩下的语种，其中有三分之二都濒临消亡。
However, by the early 1900s, unchecked trapping, poisoning, and hunting of these highly intelligent predators drove the species to the brink of extinction.
然而20世纪初期，泛滥的诱捕，下毒和狩猎使这个聪明的物种濒临灭绝。
Faced with extinction, these firms tried to change the very rules under which they had thrived for so long.
面对绝境，一些公司试图改变极端性规则，这些规则曾使他们长久兴旺。
To avoid the extinction of these species, we should stop disturbing the ecological balance on our planet.
为了避免这些物种的灭绝，我们应该停止破坏我们星球的生态平衡。
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。
These journeys made him fully aware that many of the world's species were on the brink of extinction.
这些旅行使他充分意识到世界上许多物种正处于灭绝的边缘。
Keller stressed these findings do not deny that an impact occurred around the K-T boundary, and noted that one or possibly several impacts may have had a hand in the mass extinction.
凯勒强调，这些调查结果并不否认，影响发生周围K - T边界，并指出，其中一个或几个可能的影响都有可能在大量物种灭绝中起作用。
At the same time, these authors have broken the current deadlock in the great megafaunal extinction debate.
与此同时，这些作家打破了当前关于大型动物灭绝辩论的僵局。
These findings are consistent with other evidence that anisomycin blocks both the consolidation of original learning and extinction.
这些发现与茴香霉素阻断初级学习的固化和消除的证据是一致的。
These specimens show that poor fossil preservation, rather than mass extinction, was probably responsible for this gap in the fossil record.
这些化石标本显示，贫穷的保护，而不是大规模的灭绝，可能是这个化石记录的空白在负责。
Poaching, deforestation, and inbreeding have caused the near extinction of these big cats.
盗猎、森林砍伐以及近亲繁殖造成了牠们几近灭种。
These journeys made him realize to the fullest extent that many of the world's species were on the brink of extinction.
这些旅行使他充分意识到世界上许多物种正处于灭绝的边缘。
And conservationists gather in the United Kingdom to raise awareness of shark protection to prevent the extinction of these Marine creatures.
环保学家齐聚在英国，要提升鲨鱼保护的认知，预防海中哺乳动物的绝种问题。
Sensitivity of system performance to extinction ratio degradation and its evaluation were studied. Based on these analyses, the sensitivity of FFH-OCDMA system was compared to that of DS-OCDMA system.
讨论了系统性能对消光比劣化的敏感程度问题，并给出了评价方法，并据此对跳频系统和直接序列系统进行了比较。
These findings further suggest that humans may have developed complex cognition that can aid in regulating emotional responses while utilizing phylogenetically Shared mechanisms of extinction.
这些发现进一步表明，人类也许已经具有复杂的认知功能，可以帮助调节情绪反应，同时会利用这种多种动植物共有的消除机制。
With Cauchy model the refractive indices and extinction coefficients for these specimens have been obtained by fitting experimental reflectance spectra.
使用柯西模型进行拟合反射谱，分析得到薄膜的折射率和消光系数。
With Cauchy model the refractive indices and extinction coefficients for these specimens have been obtained by fitting experimental reflectance spectra.
使用柯西模型进行拟合反射谱，分析得到薄膜的折射率和消光系数。
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