卵黄囊

During human and fetal development, yolk sac, fetal liver, spleen and bone marrow give birth to blood cells in turn.

在胚胎与胎儿期，依次由卵黄囊、肝、脾、骨髓完成造血；出生后，骨髓成为主要的造血场所。

When the yolk sac disappeared, it was developed from the embryo to the pre-larva.

胚后发育以卵黄囊的消失为依据，划分为前期仔鱼。

The 44 days of pregnancy, B-shows may see yolk sac, the doctor said that embryos may be too small to see, or it may be bad embryos.

怀宝宝44天了，B超显示卵黄囊似见，医生说可能是胚胎太小看不见，也可能是胚胎不好。

The first hemopoietic organ in embryos was the yolk sac.

发现胚胎期首先出现的造血器官是卵黄囊。

On the 14th day after yolk sac had disappeared, gonad had differentiated to ovary.

生殖腺中卵的成熟及卵巢腔的形成是「由前往后之层次」成熟，在卵黄囊消失后第四十九天的鱼苗，卵巢的发育至周边核仁期。

When the water temperature is 29-31 ℃,the time of hatch is 19 h.The yolk sac is disappear basically after 70 h.Larvae begin to eat after 90 h.

在水温2931℃时，孵化时间为19 h，孵出仔鱼后70 h卵黄囊基本消失，90 h开始摄食。

Comparison of genes in yolk sac cells with a total of 1 200 genes in the control cells, 79 genes differently expressed between the two groups were detected.

在神经管缺陷大鼠胚胎卵黄囊细胞和对照组1 200个基因中，共筛选出表达差异基因79个，其中42个基因表达上调、37个基因表达下调。

Results:In the group,there were 17(26.2%)cases of embryonal carcinomas,13(20%) cases of teratomas,10(15.4%) cases of yolk sac tumors,4(4.6%) cases of choriocarcinomas and 22(33.8%) cases of m...

结果：65例NSGCT患者中，胚胎癌17例(26.2%)，畸胎瘤13例(20%)，卵黄囊瘤10例(15.4%)，绒毛膜上皮癌3例(4.6%)，混合性生殖细胞瘤22例(33.8%)。

The gonads form from a group of large granulated yolk sac cells which invacle the germinal ridges.

性腺是由一群大的颗粒的卵黄囊细胞入缀生殖峭而形成。

It is concluded that alcohol has developmental toxicity and teratogenicity. The target organ affected by alcohol is brain. The effects of alcohol on the developmental differentiation of visceral yolk sac and DNA synthesis are probably related to its developmental abnormalities.

结论认为酒精具有发育毒性和致畸性，酒精作用的主要靶器官是脑，酒精对卵黄囊发育分化和DNA合成的影响可能与其发育异常有关。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。