查询词典 tetrapods

However, enamel and enameloid are significantly different in development, and dentin shows many histological variations; hence their evolution has been intensively studied. Nevertheless, their genetic basis has been revealed only in tetrapods.

这两类动物的釉质和釉质瘤发育是截然不同的，牙本质发育在组织学上差异也较大，关于这两类动物进化方面的研究很多，但涉及遗传基础的研究仅限于四脚动物。

Among these traits is the tooth, which consists of two characteristic mineralized tissues, a highly mineralized surface layer (enamel in tetrapods and enameloid in fish) and a softer body, both supported by basal bone.

牙齿的变化便是其中之一，牙齿由两种典型的矿化组织组成：即高度矿化的表层（四脚动物的釉质和鱼类的釉质瘤结构）和相对较软的牙本质，下方的基骨起支持作用。

The products present two different morphologies. We studied the nucleus in the center of the tetrapods by TEM, SAED systematically and finally discuss its growth mechanism.

利用透射电子显微镜，选区电子衍射技术等技术对其中心成核区域做了大量的微结构分析，讨论了其生长机制。

Its paramount importance is due to its having the greatest number and best-preserved fossil specimens of the lobe-finned fishes that gave rise to the first four-legged, air-breathing terrestrial vertebrates the tetrapods.

公园的重要性在于这里有大量的保存完好的鱼石螈的化石标本。鱼石螈是第一个进化为四条腿的，呼吸空气的陆地脊椎动物四足动物。

The earliest tetrapods were all carnivorous, so it is unlikely that, as adults, they fed much on land during the first phases of their evolution, because the only prey they would have found there were insects and other small arthropods.

最早的四足动物都是肉食性的，那时陆上的食物只有昆虫与小型节肢动物，所以成体不太可能在演化初期就以陆地做为主要的摄食处。

Less well known, but perhaps of equal evolutionary significance, are the studies on early insect flight, on stem tetrapods from the Upper Devonian, and the early stages of whale evolution.

对早期昆虫的飞行、晚泥盆世羽轴类四脚动物和鲸进化的早期阶段的研究不太为人所知，但也许有着同样重要的进化意义。

Industry Branch of the Fengtai area 21 agricultural market stalls operating tetrapods were checked Aiming to vendors in order to increase the dumplings good taste and extend shelf life of chemicals added borax phenomenon, inspection personnel at the scene using rapid testing equipment for testing, found no "borax dumpling."

丰台工商分局对辖区内21家农副产品市场经营粽子的摊位进行了检查，针对以往商贩为了给粽子增加良好口感和延长保质期添加化工原料硼砂的现象，检查人员在现场利用快速检测设备进行检测，没有发现&硼砂粽&。

Humans are tetrapods.

人类就是四足动物。

GPR39 diverged first, and an ancestral GHSR-like receptor gave rise to a fish specific clade A, GHSR and MLNR by successive gene duplication that occurred before the divergence of tetrapods and fish.

由此他们提出了分子相互作用网络系统进化形成的一种模式：新功能关系形成之前，通常存在基因共享，即一种分子参与到多个过程、多种分子间相互作用。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。