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Thyroglossal duct cysts are the most common cervical cysts and are usually considered to be a benign embryonic malformation where the thyroglossal duct fails to obliterate. Parathyroid cysts are a rare disease and may also result from malformation of the remnants of the third pharyngeal pouch.

甲状舌骨囊肿是最常见的颈部囊肿，一般认为是胚胎发育过程中，甲状舌管没有关闭造成的良性胚胎畸型；副甲状腺囊肿则是一种罕见疾病，可能起因於胚胎发育时第三咽囊的残存物。

The result has important illumination on the identity of the totipotence of human embryonic stem cells.

此结果对于人的胚胎干细胞全能性的鉴定与检测有重要启示。

As a member of POU transcription factor family, Oct-4 plays an important role in mammalian early embryonic development and takes part in maintenance of cellular totipotence and undifferentiated state.

Oct-4属POU家族蛋白，是一类在动物早期胚胎发育过程中起重要作用的转录因子，参与维持细胞的全能性及未分化状态。

BACKGROUND: Key point for subculture of human embryonic stem cells is to inhibit spontaneous differentiation and make sure totipotency of cells.

背景：人胚胎干细胞传代培养的关键是抑制其自发分化、保证细胞的全能性。

In these years, because of its totipotency, manipulation and plastics, the embryonic stem cells have been the focus of researches in the fields of medical and life science.

近年来，胚胎干细胞以其具有全能性、可操作性和可塑性等诸多优点，已经成为医学和生命科学领域研究的热点之一。

Embryonic stem cell has the totipotency, but the induction mechanisms are not identified at present.

胚胎干细胞具有发育全能性，目前其定向诱导机制尚不明确。

AIM: The key of the human embryonic stem cell culture is to guarantee the totipotency and inhibit spontaneous differentiation.

1海南医学院，海南省海口市 571101；2海南医学院附属医院生殖医学中心，海南省海口市 570102

DATA SYNTHESIS: With the capability of multi-directional differentiation and self-duplication, stem cells can differentiate into different tissues and organs, including totipotential stem cells, embryonic stem cells and multipotent stem cells.

资料综合：干细胞具有多向分化潜能和自我复制功能，可分化成不同的组织和器官，包括全能干细胞、胚胎干细胞、多能干细胞。

Results: chunxuekang had no obvious toxicologic effect in body weight change, embryonic rats development and newborn rats as well as the development status of rats.

结果：春血康对大鼠的体重变化、胎鼠生长发育及f1代仔鼠的发育状况均无明显毒性作用。

In this study, we used mRNA Differential Display to analysis the change of gene expression pattern of mouse embryo in the above two stages and the effect of releasing the transcriptionally repressive state on the embryonic development.

为了研究胚胎发育早期基因表达模式的变化及其生理意义，我们使用mRNA差异显示的方法分析了小鼠胚胎基因组激活初期（1-2细胞胚胎）表达的mRNA及随后在二细胞胚胎中转录呈抑制状态的基因表达产物，并探讨了解除二细胞胚胎中转录抑制状态对胚胎后继发育的影响。

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。