查询词典 stem from

Neck length is measured from center of head to base of collar; head-stem offset, from center of head to line through axis of distal part of stem; stem length, from medial base of collar to tip of stem; and angle of neck, by intersection of line through center of head and neck with another along lateral border of distal half of stem.

头中心至领基底的距离为颈长，头中心至柄远端部分轴线的距离为头－柄偏距；领内侧基底至柄末端距离为柄长；股骨头颈中心线与柄下半部外侧缘及其延长线的交角为颈干角。

However, the transformation rate from dominant stem to overtopped stem and from overtopped stem to dominant stem were the lowest. The interconversion of classified stem would increase as the stand density and the rate of L. gmelinii was going up. The altitude that classified stem mainly concentrated was less than 1000m, slope was less than 25°, aspect was south slope, position was at middle and lower, soil depth less than 17cm. The rate of no interconversion was 66.7% among overtopped stem. It should cut the overtopped stem as intermediate cutting.

优势木转被压木和被压木转优势木的转换率最低；随着林分密度和林分中落叶松比例增加，分级木相互转换数也增多；分级木转换现象主要集中在海拔＜1000m、坡度＜25°、坡向为阳坡、坡位为中下、土壤厚度＞17cm的林分中；被压木中，无转换的占66.7%，抚育采伐时应考虑伐除这些被压木。

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。

In Part 1 of our research, BGSCs were sorted through immunomagnetic beads marking by CD133 and cultured in vitro, and character as a stem cell was identified by stem cell markers (CD133 and Nestin) and differentiated cell markers [ microtubule-associated protein 2(MAP2), glial acidic fibrillary protein and myelin basic protein] , ultrastructure observing with electron microscopeand engrafting to severe combined immunodeficiency mice for tumorigenesis test. The results were as following: Only a small subset of CD133+ glioma cells in glioma cell lines and fresh specimens from various pathologic grade could express stem cell markers CD133 and Nestin, view ultrastructure of a stem cell and be capacity of serial passage in culture. These CD133+ cells possese a marked capacity for multipotent differentiation and could differentiate into tumor cells expressing MAP2,β-TubulinⅢ, GFAP and MBP; When engrafted into SCID mice, they can generate and form tumors that phenotypically resembl the tumor from the patient.

在本课题中，在第一部分实验中采用以CD133为标志的免疫磁珠法从人脑胶质瘤组织和细胞株中分离脑胶质瘤干细胞并进行体外培养，通过免疫荧光技术检测干细胞标志物CD133、Nestin，诱导分化后检查分化细胞标志物MAP2、GFAP、MBP以及电镜超微结构观察和移植SCID鼠致瘤实验，对其干细胞特性加以鉴定，得到如下结果：不同病理分级的新鲜胶质瘤标本和胶质瘤细胞株中存在一小部分CD133+的胶质瘤细胞，能表达干细胞的标志物CD133和Nestin，符合干细胞的超微结构特点，体外培养能连续传代；具有多向分化潜能：诱导分化后能产生MAP2、β-TubulinⅢ、GFAP、MBP染色阳性的细胞；移植SCID鼠后能形成与亲本肿瘤表型一致的移植瘤。

Of root biomass was distributed in the soil 0～20 cm deep, 69.93% of that in the area 40 cm horizontally away from stem; 92.07% of leaf biomass on the plant part 3～6 m high from ground, 83.80% of that in the area 1 m horizontally away from stem; 84.05% of the stem and branch biomasses in the area 0.5 m horizontally away from stem.

97.48%的根集中于0～20 cm土层，69.93%的根分布于距干基40 cm的水平范围；92.07%的叶分布于3～6 m的垂直范围，83.80%的叶分布于距干基1 m的水平范围；84.05%的干枝分布于距干基0.5 m的水平范围。

Neural stem cells have a strong self-renew mechanism and it can transform after a little break. Neural stem cells have a long term survival, which mean that it has more probability of wrong copy than mature cells. These cells are formed glioma stem cells in the end. The genes who adjust neural stem cells can express in glioma stem cells, which hold out glioma stem cells from neural stem cells. There is another presume that glioma stem cells come from differentiated cells. Through the gene break of these cells, they can obtain characteristics of stem cells, then form glioma stem cells.

神经干细胞具有很强的自我更新机制，获得较少突变即有可能恶性转化，而且干细胞存活时间较长，这意味着干细胞比成熟细胞发生细胞复制的错误几率更大，因外界环境的刺激而发生突变的机会更多，最终形成脑胶质瘤干细胞，同时调节神经干细胞增殖和自我更新的基因在脑胶质瘤的脑胶质瘤干细胞中也表达，这也是支持神经干细胞是脑胶质瘤干细胞来源的；也有推测认为它可能起源于已分化的细胞，由这些细胞突变发生去分化得来，并通过基因突变而获得了干细胞自我更新的特性，从而形成脑胶质瘤干细胞。

The systematic items stem from the walker's talk about the chalk.

这些系统的条款来源{本文出自：www.zhonguokw.cn中国考网。cn}于步行者关于粉笔的谈话。

The systematic items stem from the walker's talk about the chalk.

这些系统地条款来源于步行者有关粉笔地谈话。

At that time he incorporated a few further refinements suggested by Rimsky-Korsakov, who, in his capacity as posthumous proofreader, also supplied the score's metronome markings, though these and Rimsky's tempo indications in the Andante may stem from the work's successful second performance, prepared by Rimsky-Korsakov under Borodin's supervision.

同时他还在里姆斯基—科萨科夫的建议下对作品进行了进一步的改良，而里姆斯基—科萨科夫作为遗嘱校对者也提供了总谱的节拍器标记，尽管这些标记以及里姆斯基在行板中的速度提示是源自作品成功的第二次演出，这次演出是里姆斯基在鲍罗丁的指导下完成的。

The phenomena he mentions stem from the police state, and are not typical of National Socialism, even if it was typical of the Nazis to revert back to them.

他所提到的现象根源在于警察国家，并不是国家社会主义所特有的，即便它是纳粹党所特有的。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。