囊胚的

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。

In the late of April of the second year, male inflorescences unbound and pollinated. When female inflorescences accepted the pollen grains, ovary development was increased in early May. With the development of either of the two ovule, funiculus, integument and nucellus were differentiated. Embryo sac mother cell came into being and the meiosis begins. Then fuctional megaspore developed into matured embryo sac that contain eight nucleuses. In the end of May, double fertilization generated.

次年，4月下旬，雄花序解螺旋散粉，雌花序开花授粉；5月上旬，雌花序授粉后，迅速增长，子房膨大，两个胚珠分化出珠柄、珠被和珠心，珠心中产生孢原细胞；5月中下旬，大孢子母细胞形成并减数分裂，功能性大孢子形成成熟的八核胚囊；5月底，发生双受精。

The results are summarized as follows: tin the polygonum embryo sac of tetraploid grape , megaspore telrad arranged in straight line.

结果如下：在四倍体葡萄的蓼型胚囊中，四分体孢子呈直线排列，合点端的大孢子发育胚囊。

A minute structure in seed plants, containing the embryo sac and surrounded by the nucellus, that develops into a seed after fertilization.

胚珠种子植物的一个小的结构，含有胚囊并被珠心所包围，施肥后长成种子

Perisperm The nutritive tissue in the seeds of many Caryophyllaceae.It is a diploid tissue derived from the nucellus rather than the embryosac.

外胚乳：存在于多数石竹科植物的种子中的营养组织，二倍性，来源于珠心而不是胚囊。

The factors affecting the seed-set rate ofintersubspecific hybrids include embryo sac sterility,pollen sterility,anther dehiscence and non-synchronization of male and female sexual organsdevelopment in the same spikelet.

对水稻亚种间杂种及其稳定的多胚品系SB-1进行了细胞学、胚胎学和遗传学研究，主要结果如下：1、影响杂种低结实率的因素包括胚囊败育、花粉败育、花药不开裂和雌雄性器官发育进程不一致。

We creatively used yolk sac membrane to assess the antiangiogenic activity of rhK1-3 in vivo.

创造性地建立了鸡胚卵黄囊膜(yolk sac membrane， YSM)血管生成模型，在器官水平上研究了rhK1-3对鸡胚YSM血管生成的影响。

Virus was also cultured in allantoic cavity of chicken embryo with statistically significant HA titer at 1:6.8 as compared with virus control group (P.01) incubated 24 hours after injected with MEK first then injected with IBV.

在鸡胚尿囊腔中，先注入MEK孵育24 h后，再注入B型流感病毒的鸡胚也培养出病毒，HA滴度为1：6.8，与病毒对照组比较P.01，有统计学意义。

However, they could be grown on the chorioallantoic membrane of developing chick embryos, although only up to about 18 days incubation.

可是，肿瘤碎片却能在鸡胚绒毛尿囊膜（ chorioallantoic membrane， CAM ）上生长，尽管只能在孵育约18天以下的鸡胚中生长。

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。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。