化石

There are also a number of fossil genera, leptosporangiate ferns dating back to the Cretaceous era, eusporangiate ferns to the Devonian.

有化石证据表明，薄囊蕨从白垩纪时就有，而厚囊蕨可追溯到泥盆纪。

Both of these facts mean it is likely that some lineages which seem to make their first appearance in the extratropical fossil record actually started out near the equator.

上述两种因素都表明某些世系虽最早出现在热带外区域的化石记录上，实际上却有可能起源于赤道附近。

In addition, there are a lot of mammal tracks in some sections. It is of significance in determining the faunal appearance of that time.

另外，在一些剖面上还发现了大量哺乳类足迹化石，对确定当时生物群的面貌和生态环境具积极意义。

Fossils of what are thought to be filamentous photosynthetic organisms have been dated at 3.4 billion years old.

什么的化石认为是纤维状光合作用的有机体约会了在3.4十亿岁。

Under the supports of NSFC, we reported the earliest euprimate skull. Based on allometric regression analysis and cladistic analysis, we hypothesized that the last common ancestor of the euprimate was a small, diurnal and insectivorous animal. This suggestion challenged the traditional ideas, which predicted that the last common ancestor of the euprimates was nocturnal or frugivorous animal.

在该项青年基金的资助下，我们研究报道了最早的真灵长类头骨化石，通过异速生长回归分析和分支系统分析，提出了真灵长类最近共同祖先是小型的、日行性的、捕食昆虫的动物的假说，挑战了传统的认为真灵长类最近共同祖先是夜行性的或是食果动物的假说。

Here are two:"The known fossil record fails to document a single example of phyletic evolution accomplishing a major morphologic transition and hence offers no evidence that the gradualistic model can be valid," says Stephen Stanley , evolutionary paleontologist.

一个是 Stephen Stanley ，进化古生物学家，他的观点是：&已知的化石记录无法提供哪怕是一个实例来证明说物种的进化曾经完成过某种主要的形态变迁，因此也就没能为那种渐进模型的有效性提供任何证据。&

Here are two:"The known fossil record fails to document a single example of phyletic evolution accomplishing a major morphologic transition and hence offers no evidence that the gradualistic model can be valid," says Stephen Stanley, evolutionary paleontologist.

一个是史蒂芬·斯坦利，进化古生物学家，他的观点是：&已知的化石记录无法提供哪怕是一个实例来证明说物种的进化曾经完成过某种主要的形态变迁，因此也就没能为那种渐进模型的有效性提供任何证据。&

Here are two:"The known fossil record fails to document a single example of phyletic evolution accomplishing a major morphologic transition and hence offers no evidence that the gradualistic model can be valid," says Stephen Stanley , evolutionary paleontologist.

这里有两个实例：进化古生物学家史蒂芬·斯坦利说：&已知的化石记录未能录得一个完成了主要形态跃迁的种系进化的简单实例，因此也就无法为渐进式模型的有效性提供任何证据。&

These mainly are Pteridophyta and Gymnospermae and plant species are frequent ones in lower and middle Jurassic, basically in corresponding to Coniopteris-Phoenicopsis flora group of Lower-Middle Jurassic coal-bearing strata widely distributed in China.

植物化石中以蕨类和裸子类为主，植物总体种群为中外早中侏罗世地层中常见分子，基本上相当于我国早中侏罗世广泛分布的含煤地层所含Coniopteris-Phoenicopsis植物群。

Fossil gymnospermous trees or climbing plants from the Devonian: seed ferns.

裸子植物化石树或攀缘植物，起源于泥盆纪；种子蕨。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐