胚层

The ovule is orthotropous and crassinucellate, nucellus is surrounded by three envelopes.

胚珠直生，厚珠心，珠心被内、外珠被以及盖被等三层被膜所包围。

Fibers are the seed hairs of cotton, and they originate from the epidermal cells of the ovular surface. Fiber development is composed of four distinct and overlapping stages.

棉纤维由棉花胚珠外珠被表皮层的单细胞发育而成，属于种子表皮毛，其分化和发育过程由四个相互重叠的时期组成。

Seed of Podophyllum hexandrum Royle has the physiological characteristics of long dormancy and low germination in natural conditions. In order to investigate the characteristic of dormancy and find the mechanism of dormancy and the optimal method for breaking the dormancy of P.hexandrum seed, some methods such as isolated embryo cultures, biological identification, soaking seed in GA3, interaction GA3 and cold stratification were utilized.

摘要桃儿七种子在自然条件下具有休眠期长、萌发不良的生理特性，为了探讨和研究桃儿七种子的休眠特性，利用分离胚培养、生物鉴定法、GA3浸种、以及综合利用GA3和低温层积处理等方法。

Binzhou Vocational CollegeAbstract: Using environmental scanning electron microscopy and X-ray electron probe microanalysis, the Pb relative content was studied in cortex, aleuronic layer, scutellum, plumule, hypocoty, radicle and endosperm in 20 genotypes of wheat grains.

从Pb与各元素在不同部位的相关性比较看，Pb与Mg等其它6种元素的相关系数较大的部位均是糊粉层，而胚芽中Pb与其它6种元素的相关系数较低。

During male and female reproduction organ developments, CBKs were expressed obviously in temporal and spatial difference manners, especially in pollen development, tapetum cell development and degeneration and ovule development.

这种差异性突出体现在花粉细胞的发育、绒毡层细胞的发育和凋亡以及胚珠的发育等过程中。

International reply coupon: A coupon of monetary value that is sold and exchangeable for postage at post offices in member countries of the Universal Postal Union.

九国际回信邮票券：指万国邮政公约各会员国间相互约定，发售及兑换回信邮票之一种有价证券。你知道它的英文吗？·壁层，胚体壁

Results: Mast cells in uterus were mainly distributed in the myometrium, only a few in the endometrium. After ovum implantation ,the mast cells were comparatively less at the place of implantation. The number of mast cells of early and late pregnancy(1～5 dyas, 15～19 dyas) was apparently higher than that during middle pregnancy(P＜0. 05). Stained by alcian blue-safranin, both red and reddish blue mast cells decreased gradually in number during pregnancy, but the proportion of blue mast cells was increased. Critical electrolyte concentration of mast cells decreased as time went on.

结果：(1)肥大细胞主要分布于子宫肌层，子宫内膜较少，且胚泡植人部位的肥大细胞明显少于非植入部位；(2)妊娠早期(孕1～5d)和妊娠后期(孕15～19d)肥大细胞数显著多于妊娠中期(P＜0.05)；(3)Alcian蓝藏红组化染色后，可见妊娠过程中红色和红蓝混合色肥大细胞逐渐减少；蓝色肥大细胞所占比例逐渐增大，孕9～19d肥大细胞几乎全部为蓝色；(4)肥大细胞临界电解质浓度值随妊娠时间的推移而变小。

Amplified cells were cultured in PGC culture medium and non-adherence culture flask till idiosome formed, adhered and differentiated.

体外分化采用无黏附特性的培养瓶和除去白血病抑制因子的原始生殖细胞培养液，以脱饲养层法悬浮培养扩增的细胞，直到拟胚体形成及贴壁分化。

At the fifth passage, two cell strains were made into cell suspension at l×10^9L^(-1). 0.5 mL was subcutaneously incubated at the inguina of each rat for 8 weeks. Amplified cells were cultured in PGC culture medium and non-adherence culture flask till idiosome formed, adhered and differeotiated.

体内实验取连续传5代的2个细胞株，分别制备浓度为l×10^9L^(-1)的细胞悬液，于每只小鼠两侧腹股沟处皮下各接种0.5 mL，培养8周体外分化采用无私附特性的培养瓶和除去白血病抑制因子的原始生殖细胞培养液，以脱饲养层法悬浮培养扩增的细胞，直到拟胚体形成及贴壁分化。

From the study, we conclude that bFGF has the differentiative, migrative and mitogenic functions in the developing chick neuroretina.

由本实验中，我们推论在鸡胚神经网膜层发育期间，bFGF具有分化、移行和细胞分裂的功能。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。