不分化的

During the development of process of male flower,the stamen differentiatedconstantly,but the pistillate primordium degenerated and there was noremain of pistillate primordium in mature male flowers.During thedevelopment process of female flower,the pistillate primordiumdifferentiated constantly,the development of stamen stopped but didn′tdegenerated.

雄花发育过程中雄蕊原基不断分化而雌蕊原基则退化，成熟的雄花中无雌蕊原基痕迹；雌花发育过程中雌蕊原基不断分化，雄蕊的发育停止但不退化，成熟的雌花中仍可见到发育中途停止的雄蕊。

On one hand, the changes bring about promotion to the development of Chinas politics; On the other hand, some problems caused by the changes in social stratification may cause social politics unsteadiness.

一方面，这种分化对中国的政治发展产生积极的推动作用；另一方面，其分化过程中出现的一些问题有可能诱发社会政治的不稳定。

The dult stem cells abilities of differentiation, self-renewing and self-maintenance tended to be limited so that it, which is characterized of short life time, could differentiate by means of mono-direction or double direction. What is the most important is that it can not differentiate all cells from the three embryonic layer.

成体干细胞具有一定的生长期，其分化能力、自我更新、自我维持能力具有局限性，生存时间相对较短，仅能单向或双向分化，其重要特点之一是它不能分化成机体所有的三个胚层来源的细胞。

These data indicated that Smad3 protein did not play a vital role during the inhibition of myogenic differentiation by hypoxia.

结果提示，Smad3蛋白在低氧抑制成肌细胞分化过程中不起关键的作用，Smad3蛋白水平的降低可能是低氧抑制成肌细胞体外分化过程中的一个伴随事件。

No callus could be induced from leaf or petiole explants of varieties F30 and Ⅱ cultured on MS medium if supplemented alone with 6-bezyladenine （6-BA） or thidiazuron, or kinetin. However, the calli were induced on MS medium containing 2.0 mg L-1 6-BA and 0.5 mg L-1 NAA （α-naphthaleneacetic acid）, and the calli derived from petioles of variety Ⅱ could produce redifferentiated shoots, but of variety F30 could not. The later could only produce shoots directly from the base of the petioles.

将品种F30和Ⅱ的叶片和带叶叶柄接种到含不同浓度单一细胞分裂素（6-BA、TDZ、KT）的MS培养基上培养，均未能诱导出愈伤组织，而在含2.0mgL-1 6-BA＋0.5mgL-1 NAA的培养基上可以诱导出愈伤组织，且由品种Ⅱ叶柄诱导产生的愈伤组织可再分化出芽，品种F30诱导的愈伤组织却不能分化，但在其叶柄基部可直接出芽。

BACKGROUND: At present, studies show that a kind of stem cell community which in many kinds of organizations can differentiate into tissue cells of different embryonic layers; but those are different from embryonic stem cells, embryonic stem cell will lose the part differentiation potential gradually during the development of pregnancy, and will present some special phenotypes or the molecular markers, as CD105 and so on, will call it postembryonic pluripotent stem cells.

背景：目前研究认为在胚胎发育后的多种组织中存在一类干细胞群体，可分化为不同胚层的组织细胞；但又不同于胚胎干细胞，随着妊娠期间胚胎的发育胚胎干细胞会逐渐失去部分分化潜能，会出现一些特殊表型或分子标记，如CD105，称其为胚胎后亚全能干细胞。

BACKGROUND: Precartilaginous stem cells have strong proliferation ability and differentiation potential, but they are instable and prone to differentiate.

背景：前软骨干细胞虽然具有较强的自我增殖能力和多向分化潜能，但生物学性状不稳定，易分化。

On one hand, farmland is a kind of security for farmers in the primary stage of professional differentiation. On the other hand, it makes farmers reluctant to completely leave their farmland, which universalizes the diversity of farmers'professions and hinders further development of professional differentiation.

一方面，土地是职业分化初级阶段农民的保障手段；另一方面，它又使得农民不愿彻底脱离农业和农村，导致农民的兼业化，进而阻碍农民进一步的职业分化。

Objective: To investigate the effect of costimulatory factor CD40 signal on TES and the role of transforming growth factor- in this process.

转化生长因子β是目前认为作用最强的促纤维化生长因子，其在肾小管上皮细胞转分化中被认为是最重要的，但在内皮细胞转分化中的作用还不清楚。

Different cultivar underwent different stages,'White-red peony' went through the five stages all, while 'White snow tower' only had the first three stages.

不同山茶花品种其分化经历的过程也不相同，&花牡丹&经历了整个分化进程，而&白雪塔&只经过前了3个阶段。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。