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In order to test this hypothesis, we isolated and developed stable self-renewable cell lines of mesenchymal stem cells from human fetal articular cartilage and identified the cell phenotype by FACS and we found that their phenotypic markers were identical to those of mesenchymal stem cells from bone marrow.

我们从胚胎的关节软骨中获得成纤维样细胞，在体外进行培养和扩增，并用流式分析的方法对其表面标志进行鉴定，发现其表面标志与文献报道的骨髓来源的间充质干细胞的表面标志相同。

To sum up, we first conclude that we can isolate mesenchymal stem cells from human fetal articular cartilage and they can be induced to differentiae into several cells under appropriate induction conditions. Anymore, they have their original tissue speciality. Therefore, we first report that mesenchymal stem cells of articular cartilage origin are superior to mesenchymal stem cells of bone marrow origin as seeding cells of cartilage tissue engineering and we provide a kind of new seeding cells of cartilage tissue engineering for the future clinic application.

综上所述，我们首次报道不仅可从人胚胎的关节软骨中获得间充质干细胞，而且软骨来源的间充质干细胞除具有骨髓来源的间充质干细胞的多向分化能力外，还具有其来源的软骨组织特异性，那么，其作为软骨组织工程的种子细胞要优于骨髓来源的间充质干细胞，从而首次提出了一种新型的软骨组织工程的种子细胞，对于未来的软骨组织工程的临床应用提供理论依据。

Objective To explore the in vitro isolation of β2m(superscript -)/Thy-1(superscript +) bone marrow-derived liver stem cells which bear double features of stem and liver cells from bone marrow stem cells as so to provide suitable donor cells for the treatment of liver diseases by cellular transplant.

目的 尝试从骨髓干细胞中分选出具备干细胞和肝细胞双重特性的β2m/Thy-1骨髓源性肝干细胞亚群，为细胞移植治疗肝病提供合适的供体细胞。

To isolate forebrain and hindbrain of human fetuses about 9 weeks and 12 weeks from spontaneous abortion. Neural stem cells were cultured in special culture medium and were compared with growth characterization.The differentiation from these neural stem cells was investigated in both a fetal bovine serum-containing and a non-supplemented,serum-free basal medium.

材料与方法：利用神经干细胞的条件培养基，对从9周和12周胚龄的自然流产胎儿分离的前脑、后脑进行神经干细胞培养，比较其生长特性，并分别观察在无生长因子的基础培养基以及含有胎牛血清的培养基中神经干细胞的分化情况。

Prop root An adventitious root, arising from one of the lower nodes of the stem close to the soil surface, found at the junction of stem and soil that grows dowm to the ground and gives additional support to the stem, as seen in maize.

支柱根：一种不定根，起源于接近土壤表面的茎上位置较低的节部。向地生长，插入土壤，并对茎提供一定的支撑。如玉米的支柱根很常见。

Based on the data and materials collected from many years investigation over the sample plots in Daemonorops margaritae plantation in Daqingshan, Guangxi Province, this paper established a model for its stem length distribution by choosing three growth equations and using a method of twice curve fitting to describe the rule of length distribution for mother stem and sucker stem.

对广西大青山黄藤人工林固定样地进行调查和收集资料，选择Logistic、Weibull和Richards 3种理论生长方程，采用两次曲线拟合法分别描述母茎长和萌茎长结构规律，旨在建立黄藤人工林茎长分布模型。

Method］ The effective components from the stem segment of D. stramonium was extracted with distilled water, and with the treatment with distilled water as CK, the effects of extracted liquid from stem segment of D. stramonium on seed germination and seedling growth of tomato, pepper, amaranth and catnip were studied.

方法］用蒸馏水浸提曼陀罗茎段内的有效成分，以蒸馏水处理为对照，研究曼陀罗茎段浸提液对番茄、辣椒、苋菜、荆芥种子萌发和幼苗生长的影响。

The Geron team began its work with what is known as a Presidential stem cell line — stem cells derived from discarded in vitro fertilization embryos that already existed in 2001 when former President Bush decided to prohibit the use of federal funds to pursue human embryonic stem cell work.

Geron小组用一种被称为总统干细胞开始他们的工作---这种干细胞是从2001年起就存在的被遗弃的体外培养的胚胎中提取的，当时布什总统决定下令禁止使用联邦基金购买人类胚胎干细胞的研究工作。

The Geron team began its work with what is known as a Presidential stem cell line — stem cells derived from discarded in vitro fertilization embryos that already existed in 2001 when former President Bush decided to prohibit the use of federal funds to pursue human embryonic stem cell work.

Geron团队开始他们的研究工作被称为是总统胚胎干细胞株——他们利用试管受精胚胎中丢弃不要的那些干细胞，当时在2001年前任总统布什决定禁止利用联邦基金去从事人类胚胎干细胞工作。

Road level teacher, I firmly wrapped stem, small lips tightly forcing my folder stem, effectively sets the line, stems in the young woman comes to the pleasure of feeling Daoli systemic spread, I shiver all over in the , as if an electric shock on the same stem, Ma itch, Direct from the spinal cord to the body.

平老师的道紧紧包裹着我的茎，小唇紧紧夹迫着我的茎，有力地套撸着，茎在美艳少妇的道里感慨到快感传遍了全身，我浑身都在颤栗着，茎就仿佛触电一样，麻痒痒的，从脊髓直传到全身各处。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。