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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. These new cells, dubbed "induced pluripotent stem cells" or IPS's could then be converted into a variety of different cell types, such as pancreas, muscle or brain cells. The IPS's were created by inserting certain genes into the DNA of the adult cells.

不过，在2007年，科学家已经取得了重大突破，三个不同组织同时发表声明称：已经能将成熟皮细胞转化回心肌细胞，也就是说不通过胚胎组织就能让细胞具有胚胎干细胞的属性，能够让多种不同类型的细胞细胞如胰腺细胞，肌肉细胞或脑细胞重新转化为人造胚胎干细胞，将某种组织注入成体细胞DNA中便能产生IPS'S。

Investigation of DNA replication levels in primed seeds with flow cytometric determination showed that the 6C:3C ratio in embryonic root tip cells was higher than the unprimed seeds at all stages of seed imbibition.

流式细胞分析仪对引发种子DNA复制水平调查结果表明，SMP处理的种子在种子吸胀的各个阶段，胚根尖中6C与3C的比值都高于对照种子。

In conclusions: 1 The treatment that buffalo occytes are cultured in Ionomycin (5 min)+CDM (3 h)+ 6-DMAP(3 h) after ICSI with sorted sperm can improve their subsequent embryonic development; 2 The dead ultrasoniced sorted sperm can be used for ICSI; 3 The result of ICSI with sorted sperm is similar to that with unsexed sperm, but the result of IVF with sorted sperm is lower than that with unsorted sperm; 4 The treatment of heparin after ICSI with sorted sperm can improve the blastocyst development rate; 5 The development rate of blastocyst with sorted sperm was variable among buffalos indicating that sorting high quality sperm from specific buffalos can increasethe efficiency of ICSI.

结果表明：1水牛分离精子ICSI后用Ionomycin(5min)+CDM(3h)+6-DMAP(3h)方法激活处理能提高其胚胎发育率；2分离后的死精子经超声断尾也能用于水牛卵母细胞的ICSI；3分离精子的ICSI效果不低于未分离精子，但分离精子的IVF效果却低于未分离精子；4肝素能促进分离精子ICSI后的胚胎发育；5分离精子ICSI后的胚胎发育率在不同公牛之间有差异，选择能产生高质量精子的公牛进行精子分离，可以提高ICSI的效率。

Grown from adult skin, these cells are genetically transformed to have the same unspecialized function that makes embryonic cells so important.

由成体的皮肤细胞发育而来的细胞可以进行移植，具有同样非专门化的功能，这就显得胚胎干细胞尤其重要。

Regression of a specialized cell or tissue to a simpler, more embryonic,''.'unspecialized'.

去分化，反分化指高度分化的细胞或组织向更简单，更初期非特化的形式的退化。

Regression of a specialized cell or tissue to a simpler, more embryonic, unspecialized form.''.'Dedifferentiation'.

去分化，反分化指高度分化的细胞或组织向更简单，更初期非特化的形式的退化。

To E8 embryonic day, the expression was mainly in the ventral horn, especially in the motor neurons.

到了ES期，它的表达主要集中在前角运动神经元，而其它部位的信号明显较弱。

Embryonic development: During normal cloaca development process in rats, before gestational days 15, the urorectal septum developed and clearly demarcated the boundaries of the future rectum dorsally and urogenital sinus ventrally.

结果 ①胚胎发育：泄殖腔发育过程中，胎龄15天前的正常鼠胚，尿直肠隔将泄殖腔分为腹侧的尿生殖窦和背侧的直肠两部分，二者共同相通于泄殖腔管。

SIPAR continued to expressed in the mouse embryonic brain and vertebral column part from dpc9.5 to dpc 12.5 embryo.

SIPAR主要集中表达在小鼠胚胎的神经系统，SIPAR可能与神经系统发育相关。

The molecular mechanism of this major phase during vertebrate embryonic development is poorly understood.

目前对这一早胚发育的重要事件的分子机制还缺乏了解。

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。