胚胎

To investigate effect of sympathetic nerve on early development of embryo, a model of sympatholytic mice was established by 6-OHDA.

为了研究交感神经对哺乳动物早期胚胎发育的影响机制，通过腹腔注射6-羟多巴胺使交感神经阻断后，观察了小鼠妊娠前期胚胎早期发育和肥大细胞数量和型别的变化。

Three kinds of embryos' chromosome, including goat fertilization embryo, goat-goat cloned embryo and goat-rabbit cloned embryo were analyzed, The results showed that all of them have 60 chromosomes with same character, all were telocentric chromosome, besides the X-chromosome is the second larger telocentric chromosome.

经对超排获得的山羊受精胚、山羊同种克隆胚和羊-兔异种克隆胚的囊胚期胚胎染色体分析表明，三种来源的胚胎其染色体数目均为60条，且所有常染色体均为端部着丝点染色体，X染色体为第二大的端部着丝点染色体，说明山羊同种克隆胚和山羊-兔异种克隆胚均为山羊的核型，是供体细胞核在不同胞质中的重新编程的结果。4。

This finding suggests that the alterations in the expression profile of RAR alpha and beta, beta-catenin and caspase-3 may be implicated in the teratogenesis induced by excess RA in KM mouse embryo.

提示，过量维甲酸改变了昆明小鼠胚胎神经管中维甲酸受体α/β及β-catenin和caspase-3基因的正常时间表达模式，这种异常的基因表达模式可能参与了维甲酸致昆明小鼠胚胎畸形的发生机制。

These so-called tetraploid cells can go on to form placental tissue but cannot thrive in the embryo proper.

这些四倍体细胞可以继续组成胚胎组织，但不能成长为胚胎。

Embryonic stem cell lines isolated from primitive embryonic cells are highly undifferentiated and totipotent cells.

胚胎干细胞(embryonic stem cell，ES cell)系是从早期胚胎细胞分离培养而建立的高度未分化的具有全能性的细胞系。

The development speed of gynogenetic embryos was later than that of the control group, and aneuploids were found in this study. The obvious improved survival of trochophore larvae with a peak at 40s UV exposure suggested the presence of a Hertwig effect in the gynogenesis of A. pectinata. When sperms were irradiated for 40s, the cleavage rate was relatively high (51.2%), the developmental rate of D-larvae became zero, and the rate of haploid reached the highest (36.8%).

经紫外线照射的精子受精后所产生的单倍体胚胎发育速度慢于正常受精所产生的二倍体胚胎，各照射组均出现非整倍体。40s照射组中卵裂率达到51.2%，D型幼虫发生率为0，单倍体率最高，达到36.8%，出现"Hertwig效应"。

There are significant differences between the two methods. Conclusion Clysising fimbriae tubae is a better embryo collecting method for rat microinjection.

冲洗输卵管伞端采集胚胎的方法为大鼠显微注射前胚胎采集比较好的方法。

But in 2007, scientists made a revolutionary breakthrough. Three different groups simultaneously announced that they had converted unipotent, mature skin cells back into an undifferentiated state. In other words, they had created cells that behaved like embryonic stem cells without using any embryo derived materials.

可是在2007年时，科学家们取得了革命性的突破，三个不同的小组同时宣布他们能够把已分化、成熟的表皮细胞转会一种未分化的状态，换句话说，他们制造了一种类似胚胎干细胞的细胞，但没用到任何源于胚胎的原料。

The ability of melanoblasts in the Silkie embryos to migrate ventrally is correlated with a lack of peanut agglutinin binding barrier tissues, which are present in the Lightbrown Leghorn embryos.

丝羽乌骨鸡的黑色素母细胞之所以可以移动至腹部是由於其缺少了神经阻碍物分子，而此神经阻碍物分子在棕色来航鸡的胚胎发育过程中，会明显地形成一道障壁以抑制神经嵴细胞和黑色素母细胞入侵胚胎腹部。

Subsequently,with the straw and the cell freezing tube,we usedone-step and two-step method to vitrify the embryo of Lats gene knockout mice.The development ratio reached 90% 90.1 % 89.2%, 91.4% and the implantation rauo reached 50.0%, 47.1% 43.4%, 46.5% respectively after thaw.

在此基础上，用冷冻麦管、细胞冷冻管分别采用一步法、二步法对Lats基因敲除小鼠胚胎进行玻璃化冷冻，胚胎解冻后，囊胚发育率分别为：90％、90.1％、89.2％、91.4％；移植后着床率分别：50.0％、47.1％、43.4％、46.5％，差异不显著；并且与对照组相比差异也不显著。

It seems likely that Kraft will return with a better offer.

看起来卡夫要重新考虑一个更好的出价了。

But he'd rather burn off my feelers and watch me squirm.

可他却放任那个家伙对我为所欲为！