他们还研究了在巢穴里或巢穴附近发现的那三种恐龙的骨骼化石，以确定它们的性别。
They also examined the fossilized bones of those three types of dinosaurs that were found on or near nests to determine their sex.
他以及其他科学家表示，现在主要有两种替代化石燃料的选择，即用可再生能源产生能量或采用核能。
He and other scientists say there are basically two options to replacing fossil fuels, generating energy with renewables, or embracing nuclear power.
后来，在1909年到1915年之间，猛犸象洞穴里含有化石的沉积物被拖出，并以一种今天的科学家都不会同意的混乱的方式进行了检测。
Later, between 1909 and 1915 sediments in Mammoth Cave that contained fossils were hauled out and examined in a chaotic manner that no scientist today would approve.
盖格尔和她的同事们研究了3200年前的骨头化石，这些骨头属于一种已经灭绝的叫做欧洲野牛的种类。
Geigl and her colleagues looked at 3200-year-old fossil bones belonging to a single individual of an extinct cattle species called an aurochs.
例如，四趾的始祖鸟先于三趾的始祖鸟出现，但北美的化石证据表明，这两种动物之间有一个急促而不均衡的转换过程。
The four-toed Eohippus preceded the three-toed Miohippus, for example, but North American fossil evidence suggests a jerky, uneven transition between the two.
关于在这一亿年的重要时期中没有化石，有一种解释是，早期的动物是软体动物，根本不会变成化石。
One interpretation regarding the absence of fossils during this important 100-million-year period is that early animals were soft-bodied and simply did not fossilize.
在这重要的一亿年的周期内缺乏化石（记录），关于这一点，有一种解释是早期的动物是软体动物，所以它们无法形成化石。
One interpretation regarding the absence of fossils during this important 100-million-year period is that early animals were soft bodied and simply did not fossilize.
棘螈是一种原始鱼类，它的化石遗迹显示，尽管棘螈有基本的四肢，但它却不能在陆地上行走。
Fossilized remains of Acanthostega, a primitive fish, reveal that even though the animal had rudimentary limbs, it could not walk on land.
偶尔，一个富含化石的岩层序列可以让我们持续并全面地观察一种生物。
Occasionally , a sequence of fossil-rich layers of rock permits a comprehensive look at one type of organism over a long period of time.
另一种是通过使用非化石燃料来彻底停止二氧化碳排放。
The other is to stop CO2 emissions altogether by using non-fossil fuels.
舒宾的杰出成就是带领了一次北极探险。在这次探险中，他们发现了一种半鳍半肢的动物——一条有腕的鱼化石。
Shubin distinguished himself by leading an expedition to the Arctic, which uncovered the remains of a fish with a wrist-a creature with part fin and limb.
动物化石可鉴定的有10个种属，均属于中国东北更新世晚期猛犸象—披毛犀动物群成员。
There are at least 10 species Paleontology fossils, members of Mammuthus-Coelodonta groups in late Pleistocene in northeast of China.
但是一项新的研究提出了这样一种可能性：虽然生物化石的颌骨和牙齿看起来似乎是按照事先设计好的方式发挥功能，但是这并不代表他们实际如此。
Yet a new study suggests that even if the jaws and teeth of fossilised creatures look as if they are built to function in a given way, it does not mean that they actually did so.
而且仅第一次，他就在短短几天的扫描时间里他就发现了上百种新化石。
And in only a few days of scanning he has revealed hundreds of new fossils for the first time.
在这里输入译文专家已经证实这些植物化石是一种没有根和茎的原始苔类。
Experts have confirmed that the fossilised plants are liverworts, a simple species which has no roots or stems.
根据能源部的说法，如果成功，它将为这种储量超过地球上其他所有化石燃料总和的能源的开采提供第一种可行办法。
If it succeeds, it could provide the first method of tapping a resource that may exceed the combined energy of all other fossil fuels on earth, according to the Department of energy.
之所以这么说，是因为根据在埃塞俄比亚的新发现，大约在340万年前，一种可能和著名化石露西同种的猿人就开始使用石器工具切割大型哺乳动物的肉。
Because new discoveries from Ethiopia show that what was likely the species of the famous fossil Lucy used stone tools to butcher meat from big mammals-about 3.4 million years ago.
在它的一小块化石样本中，他们发现了两种典型的黑素体。
In a small sample of its fossil, the scientists found two types of melanosomes.
换句话说，要对某种古代物种的行为得出明确的结论，只有一种类型的的化石是远远不够的。
In other words, having only one type of fossil is often not enough to draw definitive conclusions about an ancient species' behavior.
石油是一种化石燃料。
在犹他州和阿拉斯加州还发现了另一种鸟的“足迹”化石，但都无法追溯到白垩纪早期——恐龙时代的鼎盛时期。
Other bird "trace" fossils have been found in Utah and Alaska, but none from so far back as the early Cretaceous -- at the height of the age of dinosaurs.
骨骼化石附近的其他发现则显示当时处于树木繁茂期，有29种禽类化石和20种小型哺乳动物化石在此地点被发掘。
Findings near the skeleton indicate that at the time it was a wooded environment. Fossils of 29 species of birds and 20 species of small mammals were found at the site.
与“阿蒂”一起被发掘的还有29种禽类化石和20种小型哺乳动物化石，包括枭类、鹦鹉、鼩鼱、蝙蝠和老鼠。
Ardi was found in alongside crumbling fossils of 29 species of birds and 20 species of small mammals - including owls, parrots, shrews, bats and mice.
发现的化石：现在的苔类是已知的最古老的一种植物，可能进化自藻类。
Fossils found: Modern liverworts are one of the oldest known species of plant, thought to have evolved from algae.
煤、石油、天然气是三种传统化石燃料，其在地球上的储存方式及人们的使用方式各不相同。
The three conventional forms of fossil carbon-oil, coal and gas-differ both in the way the Earth stores them and the way its people use them.
人们还对叶岩保存如此完好百思不得其解，有一种可能性是在化石在形成之时，古生物被迅速掩埋，而当时的环境并不适合细菌分解这些生物的软体部分。
Nobody knows exactly why they were so well preserved.One possibility is that the creatures were buried quickly and in conditions that were hostile to the decomposition of soft body parts by bacteria.
人们还对叶岩保存如此完好百思不得其解，有一种可能性是在化石在形成之时，古生物被迅速掩埋，而当时的环境并不适合细菌分解这些生物的软体部分。
Nobody knows exactly why they were so well preserved. One possibility is that the creatures were buried quickly and in conditions that were hostile to the decomposition of soft body parts by bacteria.
人们还对叶岩保存如此完好百思不得其解，有一种可能性是在化石在形成之时，古生物被迅速掩埋，而当时的环境并不适合细菌分解这些生物的软体部分。
Nobody knows exactly why they were so well preserved. One possibility is that the creatures were buried quickly and in conditions that were hostile to the decomposition of soft body parts by bacteria.
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