在生物进化框架中，体质人类学和现存的及已灭绝的物种有密切关系。
In the framework of biological evolution, physical anthropology and the existing and extinct species closely related.
许多业已灭绝的物种，或许大多数已灭绝的物种，是由于自然原因而非人类干扰的原因而灭绝，这一点肯定无人质疑。
Certainly no one can argue that many, and perhaps most, extinct species became extinct naturally rather than due to human interference.
即使新的种群属于不同物种，它也可以大致填补已灭绝种群空出的生态位，保持食物网的完整。
Even if the new population is of a different species, it can approximately fill the niche vacated by the extinct population and keep the food web intact.
作为已灭绝物种或人类种族，尼安德特人与旧石器时代中期的工具有关。
An extinct species or race of human beings, Homo neanderthalensis, associated with Middle Paleolithic tools.
通过比较腐鱼与化石的照片，研究人员能猜测出已灭绝物种的形状。
By comparing photos of rotting fish to fossils, researchers can guess what the extinct creature looked like.
化石记录向人们出示了已灭绝物种存在过的证据。
The fossil record showed evidence of life forms that no longer existed.
自然保护国际联盟估计全世界已认定的47677个物种中有约17300个物种濒临灭绝。
The IUCN estimates that nearly 17, 300 of the world's 47, 677 assessed species are under threat of extinction.
草原象和森林象已经分开了至少3百万年，研究者表示，就像亚洲象和已灭绝的长毛猛犸象一样，彼此成为完全不同的物种。
Savannah and forest elephants have been separated for at least three million years, they say, and are as distinct from each other as Asian elephants are from the extinct woolly mammoth.
在过去的五亿四千万年里，由于自然大事件，已发生过五次大规模的物种灭绝。
Over the past 540 million years, five mega-wipeouts of species have occurred through naturally-induced events.
北美驯鹿以小群居的形式生活在林地，目前这一物种已濒临灭绝，仅存于加拿大北部地区及美国的阿拉斯加州。
These woodland caribou live in small, threatened herds that are confined to northern Canada and Alaska.
她一看完那个关于已灭绝物种的电视节目，就立志加入野生动物保护组织。
No sooner had she finished watching that programme about those extinct species, than she decided to join the Wildlife Conservation Organization.
夏斯报告说，在石油污染严重的地区，某些物种已几乎完全灭绝。
Chasse reported that some species that lived in heavily oiled areas were almost completely wiped out.
古生物学专业研究化石和学习已灭绝的生物物种。课程包括化石的形成和化学，植物化石，实地和实验室的研究方法等。
Paleontology majors study fossils and learn about extinct life forms. Topics of study include fossil formation and chemistry, fossil plants, methods of research in the field and lab, and more.
这些已灭绝物种的牙齿破损发生率要明显高于现存物种。
The breakage frequencies in the extinct species were strikingly higher than those in the present-day species.
人类约在7,000年之前抵达Kaliko群岛，在3,000年不到的时间内大多数栖息在Kaliko群岛森林中的大型哺乳动物物种已宣告灭绝。
Humans arrived in the Kaliko Islands about 7,000 years ago, and within 3,000 years most of the large mammal species that had lived in the forests of the Kaliko Islands had become extinct.
然而，由于人类对环境的破坏以及人为猎杀，今天能看到野生大象的地方已越来越少……气候变暖、冰山消融、物种灭绝灾难不断。
Today, climate change, iceberg melting and bio-disasters are no longer news to us. It is our inescapable duty to preserve what is left. PROTW, or Protect Resource of the Wildlife, is thus founded.
然而，由于人类对环境的破坏以及人为猎杀，今天能看到野生大象的地方已越来越少……气候变暖、冰山消融、物种灭绝灾难不断。
Today, climate change, iceberg melting and bio-disasters are no longer news to us. It is our inescapable duty to preserve what is left. PROTW, or Protect Resource of the Wildlife, is thus founded.
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