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We suppose that there is a presently undefined subfraction of stem cell population that exists in a number of tissues beyond embryonic development. We term them postembryonic pluripotent stem cells. They differ from embryonic stem cells in that they gradually lose some differentiation potentials during development and adopt some special phenotypes once within a certain tissue. They can give rise to different kinds of stem cells; therefore, help to maintain balance during development and metabolism. They provide cells not only for the damaged tissues they reside, but also for damaged tissues different from them by migration triggered by proinflammatory cytokines or growth factors.

我们认为在胚胎发育后的多种组织中都存在一类原始干细胞群体，它们和造血干细胞、神经干细胞等多能干细胞不同，后者只能分化为特定胚层的细胞，而这类原始干细胞可分化为不同胚层的组织细胞；另一方面，它们区别于胚胎干细胞，在妊娠期间会逐渐失去部分分化潜能，并且会出现一些特殊表型或者分子标志，我们称其为胚胎后亚全能干细胞，这类干细胞具有下列特性：可分化为不同胚层的细胞，分布于身体的所有组织和器官，具有相同的表型或标志；他们在胚胎期存在于一些或全部的组织和器官中，可分化为不同类型的多能干细胞并在生长发育和新陈代谢中维持这些多能干细胞保持平衡；可以参与机体自我修复和更新，不仅能分化为所在器官的组织特异性细胞，参与器官重塑，也可以在炎症因子或者生长因子的趋化作用下，远处转移修复受损组织。

Prefilter and postfilter plugins are very similar in concept; where they differ is in the execution -- more precisely the time of their execution.

前过滤符号与后过滤符号外挂在概念上是很相似的；此两者的不同是在执行的时候--更正确的说法是在执行的时间。

Male and 30 female patients came in with a mean age of 33 years. Prodromal symptoms did not differ from that in literature.

男27，女30例，平均年龄33岁，平均病程31个月，大部分为亚急性，先兆症状与文献报道相似。

In patient group, 40.74%(11/27) had DQB1 * 0503. The gene frequencies were 0.2302. In control group only 3. 75%(6/160) had DQB1 * 0503. The gene frequency was 0.0189. The differ- ence between the two groups was significant. After P value cor- rection, the difference was still significant.

在病人组中检出频率为40.74%（11/27），基因频率为0.2302，而对照组中DQB1*0503出现的频率只为3.75%（6/160），基因频率为0.0189，二组差别具有显著意义，校正P值后仍有显著意义。

Studies also indicate that galena and Sphalerite intungsten-tin deposits related to Yanshanian subalkaline granite differ obvi-ously from these minerals in lead-zinc deposits associated with Yanshanianintermediate-acid granitoids in contents and ratios of minor elements.

研究还表明，与燕山期偏碱性花岗岩有关的锡钨矿床和与燕山期中酸性花岗岩类有关的铅锌矿床其方铅矿、闪锌矿的微量元素含量及比值存在明显的差别。

There is obvious difference between groundwater and surface water ,and the effluents in winter and in spring also differ greatly. This study shows that SOS / umu test, as an important and useful method for drinking water safety evaluation, can be used for evaluating the removal efficiency of the genotoxicity quickly and accurately.

通过研究表明，本研究所应用的生物毒性测试SOS/Umu能够快速、准确地对水厂工艺过程中致突变物质的处理效果进行评价，能对工艺改进提出指导，是自来水质安全性评价的重要补充手段。

One of the answers to the above questions lies in the fact that Chinese philosophy and Western philosophy differ from each other in that the former chooses the unexpressible, that is, activity, as a way of exploring and expressing truth, but the opposite is true for the latter.

其中的一个回答是，中国哲学与西方哲学的最主要差别在于中国哲学以&不言说&的实践方式作为探索和表达真理的手段，而西方哲学则以&言说&的方式作为探索和表达真理的手段。

Main performance for epigastralgia, vomitive bile, distension of the abdomen, lose weight and so on a series of performance syndrome, common after stomach excision stomach and intestines anastomosis, total disease incidence rate approximately 5% about billrothⅱafter the type stomach excision method's disease incidence rate is billrothⅰtechnique-like 2~3 times in view of the fact that its symptom pathological change as well as the treatment response excises after other stomachs the syndrome differ from, roberts and so on excises after the stomach in the complication branches out this sickness, lists as one kind of independent illness.

主要表现为上腹痛、呕吐胆汁、腹胀、体重减轻等一系列表现的综合征，常见于胃切除胃肠吻合术后，总发病率约5％左右其中billrothⅱ式胃切除术后的发病率为billrothⅰ术式的2～3倍鉴于其症状病理变化以及治疗反应与其他胃切除后综合征有所不同，roberts等将本病从胃切除后并发症中分出、列为一种独立的病症。

Originally, the management based files in the sole personal computer cannot meet the requirement of remembered and drawled in the differ places.

原来在单个PC机已经不能满足用户的要求。

Flours differ not only in the kind of wheat from which they are made, but also in the way they are milled.

面粉不仅因制作所用小麦品种不同而有差异，而且因碾磨方法不同而有差异。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。