胚层的

It is concluded that the initial ancotomic site of blood island genesis may be is mesoblast of extraembryonic blastoderm rather than the yolk sac; the blood vessel endothelium cells and the blood cells are generated parallel; the PGCs are the common ancestry of angioblast and HSC.

血岛最早发生的解剖位置可能不是卵黄囊而是胚外胚盘中胚层，血管内皮细胞与血细胞平行发生，PGC是成血管－造血干细胞的共同祖先。

Morphologically, embryonic stem cells developed from unicells into compact three-embryonic layer embryoid body and into incompact cell population.

胚胎干细胞在形态学上由单细胞发育为致密的包含3胚层结构的拟胚体，再继续分化为松散的细胞群落。

Benign cystic teratomas are well-differentiated tumors composed of a variety of parenchymal cell types representative of more than one germ layer, usually all three. The most common locations are the gonads and sacrococcygeus.

成熟囊状畸胎瘤是一种良性且分化良好的肿瘤，由胚胎原始细胞分化而成，由多於一层胚层之组织而成；好发位置为性腺体、骶骨与尾骨部或纵隔腔，十分罕见於头颈部。

Differentiation of the protoderm layer marked the beginning of the structural differentiation in globular stage.

球形胚时期表皮原层的分化标志着体细胞胚结构分化的开始。

An individual characterized by relative prominence of the abdomen and other soft body parts developed from the embryonic endodermal layer.

胖型体质者内胚层体型者，指以相对明显突出的腹部及其它由内胚房发展而来的身体柔软部分均较明显隆起的人

An individual characterized by relative prominence of the abdomen and other s of t body parts developed from the embryonic endodermal layer.

胖型体质者内胚层体型者，指以相对明显突出的腹部及其它由内胚房发展而来的身体柔软部分均较明显隆起的人

An endodermal sinus tumor of the testis is shown composed of primitive germ cells that form glomeruloid or embryonal-like structures.

睾丸的内胚层窦肿瘤由原始生殖细胞构成，这些细胞形成血管球或胚芽样结构。

Part of animal circular muscles and longitudinal muscle layers, in the longitudinal muscle of mesodermal origin under the body cavity membranes.

环节动物有环肌及纵肌两层，在纵肌之下为中胚层来源的体腔膜。

The optimum work concentration of the indirect ELISA for detecting and screening positive hybridoma cells was established by research again and again. Polystyrene microtitration plates were coated with the purified DHV antigen at the amount of 0.5μg/well.

对鸡胚和鸭胚增殖的尿囊液病毒用反复冻融、氯仿处理、0.22μm滤膜过滤、PEG反透析浓缩以及Sephadex G-200分子筛层析的方法进行纯化，并以此来包被酶标板以及进行BALB/c小鼠免疫，效果良好。

The depth of tectal layerⅠand the morphological characteristics of tectal cells in layerⅠwas investigated using Nissle staining, Golgi staining, and postmortem labeled with DiImethod. Most ofⅠcells appeared shuttle, others showed round, oval, pyramidal, triangular,and polygonal etc. The lateral region of layerⅠwas thicker than the ventral and the dorsalregions.

本研究使用Golgi-Cox法，灌流固定后尼氏体染色、羰花青荧光染料DiI(1，1′-dioctadecyl-3，3，3′，3′-tetramethylindocarbo-cyanine perchlorate)逆向神经标记技术，对雏鸡视顶盖Ⅰ层的厚度和该层的细胞形态、大小进行了观察研究和数理统计，并对不同日龄鸡胚的Ⅰ层厚度进行了数理统计及分析研究。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。