查询词典 tetrapod

On earth-and turned old notions about early tetrapod evolution, diver-sity, biogeography and paleoecology on their heads.

其关键的篇章---也转变了人们以往在早期四足动物进化，生物多样性，生物地理学，古生态学的旧的观点和理念。

The x-y spatially-resolved mapping of polarized Raman scattering spectra from a single tetrapod-like ZnO nanostructure were proposed and performed, with different polarized scattering configuration by utilizing the intrinsic geometry configuration.

此外，通过对量子线的磁阻测量，揭示一维结构中载流子在磁场中的输运行为。 2。首次根据四角晶须状ZnO纳米结构的天然的空间几何构型，采用不同的Raman散射配置，研究单个纳米结构的具有高空间分辨率的偏振Raman二维扫描谱。

In a second paper in the journal, the scientists describe in depth how the pectoral fin of the fish serves as the origin of the tetrapod limb.

在第二篇文章中，科学家详细描述鱼的胸鳍如何担当tetrapod肢体的起源。

We previously reported that many genes involved in tetrapod tissue mineralization arose from a common ancestor and constitute the secretory calcium-binding phosphoprotein gene family.

我们先前的研究证实，许多与四脚动物矿化有关的基因均来自于一个共同的祖先，组成了分泌型钙结合磷蛋白基因家族。

That hypercondensed biography, the scientists said, may well make the chameleon the shortest-lived tetrapod on Earth , a creature chronologically more like a butterfly or a sea squirt than like the other reptiles, frogs, birds and mammals with which it is taxonomically bundled.

科学家说，这是一个浓缩的传记，最好把这种变色龙命名为地球上寿命最短的四足动物，按时间先后顺序排列，是一种更像蝴蝶或海鞘的生物，而不像其它的爬行动物，蛙类，鸟类和哺乳动物。

This finding suggests that teleost and tetrapod SCPP genes have experienced independent parallel duplication histories.

这一发现表明，硬骨鱼和四脚动物发育过程中SCPP基因经历了各自的平行复制。

Now we show that teleost fish also use many SCPPs for enameloid and dentin mineralization, but none of these directly corresponds to tetrapod SCPPs.

本研究显示硬骨鱼在釉质瘤形成和矿化中也分泌SCPPs，但与四脚动物的SCPPs无直接关联性。

New material indicates differing ontogenetic trajectories for their forelimbs: In Ichthyostega, the pattern of muscle attachment processes on small humeri resembles that in "fish" members of the tetrapod stem group such as Tiktaalik, whereas large humeri approach the tetrapod crown-group condition; in Acanthostega, both small and large humeri exhibit the crown-group pattern.

过去，研究人员相信Acanthostega是在化石记录中最像鱼的陆地动物，但这一有关Ichthyostega 迁徙前肢的新发现表明，Ichthyostega 应该在进化树上占有一个更基底的位置，而其它的种系（如Acanthostega）可能是从Ichthyostega 所进化而来，而非反过来的情景。

The results show that the growth rate of tetrapod ZnO is controlled by spiral growth and its crystallization is via VLS model. The condensation of tiny zinc droplets in zinc vapor is the key factor of the formation of tetrapod ZnO. The growth steps are formed on the terminated faces as zinc diffuses outwards and the elongation of whiskers continues until zinc inside the droplets is depleted. VS crystallization, which has little effect on the elongation growth, takes place on side faces of the whiskers and consequently makes the whiskers radius increase.

结果表明： T-ZnO晶须的结晶作用是气-液-固方式，晶须生长受螺旋生长机理控制；锌蒸气中产生凝聚生长的锌液滴是制备T-ZnO晶须的关键，锌从液滴内向外扩散在晶须的端面产生生长台阶，随着液滴内的原子向外不断扩散，针体部分就不断地伸长生长，当液滴内的原子全部消耗尽时，晶须便不再发生轴向生长；气-固方式的作用主要是促进晶须棱面生长而使晶须变粗，对轴向生长几乎没有影响。

These fossils, found on Ellesmere Island in the Canadian Arctic, are the most compelling examples yet of an animal that was at the cusp of the fish-tetrapod transition.

这些化石，在北极加拿大Ellesmere海岛被发现，是在鱼向四足动物tetrapod转变的汇合点的动物的最引人注目的示例/。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。