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.
章鱼是许多物种的猎物，包括人类，那么它如何逃脱捕食者的猎杀呢？
The octopus is prey to many species, including humans, so how does it escape its predators?
自从一万年前冰河时代结束，气温回升到北纬地区，许多物种都向北迁移。
Since the Ice Age ended ten thousand years ago and warmer temperatures returned to the northern latitudes, many species have migrated north.
化石记录显示，已经有许多物种存活了数百万年——那么我们为什么不能呢？
The fossil record shows that many species have endured for millions of years—so why shouldn't we?
遗传研究中出现的新方法使分类学家修正了他们对许多物种间进化关系的看法。
New methods developed in genetic research have led taxonomists to revise their views on the evolutionary relationships between many species.
许多物种似乎在数百万年的化石记录中都保持不变——而这种情况似乎与达尔文的持续变化模型不一致。
Many species appear to remain unchanged in the fossil record for millions of years—a situation that seems to be at odds with Darwin's model of continuous change.
许多物种非常相似，因此有可能杂交繁衍出后代，而且这种情况可能经常在自然界中发生；但对于大多数物种来说，这一规则大体适用。
Many species are similar enough that hybrid offspring are possible and may often occur in nature, but for the majority of species, this rule generally holds.
“许多物种在笼子里紧紧挤在一起”，他说。
“There were many species in cages closely packed together,” says Yi.
许多物种不可能从基因上适应海洋酸化，因为变化实在太快了。
Many species are unlikely to genetically adapt to ocean acidification, because the change is occurring too quickly.
许多物种在这一片区域被发现，都躺在一处遥远的沙丘延伸处。
Many of the specimens were found at one location, lying on the surface of a remote stretch of dunes, which in prehistoric times, had been covered by lush plains and broad rivers.
事实上，许多物种可能还没有站稳脚跟——当然，人们从未注意到这一点。
Indeed, many probably fail to establish themselves at all-but those failures, of course, are never noticed.
我们可根据岩石里的化石得出结论：自生命开始数百万年以来，许多物种已经灭绝了。
We can tell from fossil evidence in rocks that many living species have become extinct over the millions of years since life began.
许多物种都存在辐射不足问题，包括各种鼠类：人类同样缺乏辐射的证据也非常令人信服。
A radiation deficiency is seen in a variety of species including rats and mice: the evidence for a radiation deficiency in humans is compelling.
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。
Earth is experiencing its sixth mass extinction event, species winking out of existence before we even know them.
“总体来说，因为许多物种都没有追踪调查过，所以我们对不同物种本性的了解有限。”他说。
"Generally we know rather little about the performances of different species, as many have not yet been tracked," he said.
许多物种，比如灰狼和棕熊，在遭受了数量急剧下降和自然栖息地的破坏殆尽之后，它们的活动范围小得可怜。
Many species, such as the grey Wolf and brown bear, have experienced substantial population declines and seen their ranges contract as their natural habitats have been destroyed.
Sharrock先生说受威胁清单上的许多物种都是英国植物园和收集园中最常见景色的物种，包括。
Dr Sharrock said that a number of species on the threatened list were relatively common sights in gardens and collections across the UK, including.
研究团队在《公共科学图书馆·生物学》(PLoS Biology)中警告说，许多物种会在得到研究前灭绝。
The team warns in the journal PLoS Biology that many species will become extinct before they can be studied.
据认为，在世界最偏远区域研究食肉物种的植物学家和探索者忽视了这些在许多物种中已经被确认了的杀手植物。
The killer plants have been identified as among a host of species that are thought to have been overlooked by botanists and explorers searching the world's remotest regions for carnivorous species.
但是现代遗传学技术表明，许多物种的雌性很明显是处于一种单配关系中，但所生育的后代却有着不止一个父亲。
But modern genetic techniques have shown that in many species females in apparently monogamous relationships often produce families that have more than one father.
“这些结果只是冰山一角，”管理该名单的克雷格希尔顿·泰勒说，他说，许多物种尚未被分析评估但同样也受到严重威胁。
"These results are just the tip of the iceberg," said Craig Hilton-Taylor, who manages the list. He said many more species that have yet to be assessed could also be under serious threat.
“理解保护策略的制订标准很重要，”库恩说道，“当然，对于许多物种来说，这种古老的基因信息派不上什么用场。”
“Understanding the baseline from which to assess conservation strategies will be important,” says Kuhn. “Of course, for many species, this type of ancient genetic information isn't available.
另一方面，灭绝的速率或许也被低估了，这意味着许多物种——远远多于我们原先认为的——在还没有被发现之前就已经灭绝了。
Extinction rates may therefore also have been underestimated, meaning
长期以来，斯图尔特堡基地经常在他们训练最繁忙的地区实施可控制的焚烧，以防止实弹造成意外的火灾，同时这些烧焦的空地对当地许多物种产生了相当的吸引力。
Fort Stewart has long used controlled burning in its busiest training areas to prevent live ammunition from causing unplanned fires. Local species gravitated toward those scorched open areas.
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.
植物平衡了生态系统、保护了流域、减缓了侵蚀、缓和了气候，为许多动物物种提供了庇护所。
Plant life balances ecosystems, protects watersheds, mitigates erosion, moderates climate and provides shelter for many animal species.
记住，当时许多动物物种的活动范围是不同的，所以所有这些动物实际上都生活在那个地区。
Remember that the ranges of many animal species were different back then, so all these animals actually lived in the region at that time.
一个现实而紧迫的问题是，许多植物物种还没有被编目，因此它们在生态系统中的位置是未知的。
A real and pressing issue is that many plant species have not yet been cataloged, and so their place in the ecosystem is unknown.
一个现实而紧迫的问题是，许多植物物种还没有被编目，因此它们在生态系统中的位置是未知的。
A real and pressing issue is that many plant species have not yet been cataloged, and so their place in the ecosystem is unknown.
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