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。
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。
The brain size in earlier fossil specimens was about 500cc but rose to 800cc toward the end of the species life period.
该化石标本脑容量在较早时曾升至约800cc的500cc，但对末的物种生命。
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。
Specimens from all over the world come in, still encased in the rock or mud where they were found, and it's the job of the fossil preparators to get the skulls, femurs and teeth out.
世界各地的标本在被运到这里时，还被密封在岩石或发现源地的污泥之中，只有经过化石准备工作以后，那些头颅、股骨和牙齿才能显露出来。
The most important specimens, Zhou says, "are not discovered by scientists at the city's fossil shops, but at the homes of the dealers or farmers who dug them.
周忠和表示，最重要的化石标本并不是由科学家们发掘出来的，它们也不会放在化石铺子中，而是被藏在化石贩子或农民的家中。
The most important specimens, Zhou says, "are not discovered by scientists at the city's fossil shops, but at the homes of the dealers or farmers who dug them."
周忠和表示，最重要的化石标本并不是由科学家们发掘出来的，它们也不会放在化石铺子中，而是被藏在化石贩子或农民的家中。
The specimens predate the first truly multicellular organism, called Grypania spiralis, which appeared in the fossil record 1.4 billion years ago.
与在化石记录14亿年前出现的称为Grypaniaspiralis的第一种真正的多细胞生物相比，这些标本还要更早。
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。
The longterm preserved specimens and fossil insects, when used for stable isotope analysis, can expand the temporal scale of these studies greatly.
对长期保存标本与昆虫化石的同位素分析则扩展了研究的时间范围。
The fossil, dubbed "Mrs. T" by the researchers, is one of 11 Darwinopterus specimens that have been recovered from the formation.
研究人员戏称这块化石标本为“T夫人”，它是在髫髻山组发掘的11 块 达尔文龙化石之一。
The fossil, dubbed "Mrs. T" by the researchers, is one of 11 Darwinopterus specimens that have been recovered from the formation.
研究人员戏称这块化石标本为“T夫人”，它是在髫髻山组发掘的11 块 达尔文龙化石之一。
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