The oldest known specimens date to the Upper Paleolithic period in Western Europe, 12,000 to 15,000 years ago, although none of those artifacts were directly dated.
已知最早的标本是西欧旧石器早期的1万2千年到1万5千年之前，虽然这些标本没有直接进行确定年代。
The oldest known specimens date to the Upper Paleolithic period in Western Europe, 12, 000 to 15, 000 years ago, although none of those artifacts were directly dated.
已知最早的标本是西欧旧石器早期的1万2千年到1万5千年之前，虽然这些标本没有直接进行确定年代。
There are few known fossil specimens of these ancient snakes and only three in which the hind limbs are preserved and visible.
这些古老蛇类的化石标本非常稀少，仅有的三个标本的后肢保存完好并可见。
There are few known fossil specimens of these ancient snakes, and only three in which the hind limbs are preserved and visible.
有关这些古老蛇类的化石标本非常稀少，仅有的三个标本的后肢是加工过并且可见的。
The University of Texas's digital library, known as Digimorph, for example, contains hundreds of specimens and nearly a terabyte of data.
例如，德克萨斯大学的被称做Digimorph的数字图书馆就包含几百种标本和接近1000G的数据资料。
Known as Eoplectreurys gertschi, the spiders are older than the only two other specimens known by around 120 million years and rival their detail, paleontologists said in February.
2月份的时候古生物学家说，这种拉丁学名为Eoplectreurysgertschi的远古蜘蛛比仅知道的两种约1万2千年前的蜘蛛物种要更早，在细部上毫不逊色。
It had been known since 1939 but only from mangled specimens dragged to the surface by nets.
它自1939年就已为人所知，但只是从缠在网上被拖到表面的残缺标本。
Most fossil specimens are little more than carbon impressions although distinctive shapes are known.
尽管清晰的形状已为人所知，但大多数化石标本只不过是炭质印痕。
It was finally known from energy consumption analysis of joints that, generally speaking, all specimens possessed good capability of energy consumption.
由搭接节点耗能分析可知，总体看来各试件具有良好的耗能能力。
The little information known has been mostly based on dead and dying specimens that were caught by commercial fishing boats or washed ashore.
已知的资料很少，大部分已经死亡，死亡的标本这是由商业渔船捕获或冲上岸。
They may not look like much, but these specimens offer evidence of the earliest people known to have been living in North America.
他们不也许看起来象，但是这些标本提供最早期的人民的证据已知住在北美洲。
They may not look like much, but these specimens offer evidence of the earliest people known to have been living in North America.
他们不也许看起来象，但是这些标本提供最早期的人民的证据已知住在北美洲。
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