器官形成

The sound segments are grouped into consonants and vowels.there are several basic ways in which articulation can be accomplished:the articulators may close off the oral tract for an instant or a relatively long period;they may narrow the space considerably;or they may simply modify the shape of the tract by approaching each other.manners of articulation:stop,fricative,approximant,lateral.other consonantal articulations include TRILL,TAP or FLAP and AFFRICATE.consonants may be produced at practically any place between the lip and the vocal folds.eleven places of articulation are distinguished on the IPA chart.

音段可以分成辅音和元音两类。有这么几种发音的方法：发音器官暂时或相对长时间地关闭口腔通道；发音器官空间缩小；或者，发音器官互相贴近形成不同形状的通道。发音方法：塞音，擦音，通音，边音。其他的辅音发音方法包括颤音，触音或闪音，塞擦音。辅音几乎可以产生于唇和声带之间的任何部位，国际音标表区别了其中11个发音部位。发音部位：双唇音，唇齿音，齿音，齿龈音，后齿龈音，卷舌音，腭音，软腭音，小舌音，咽音，声门音。

Organogenesis actually includes two closely linked processes morphogenesis and differentiation.

器官形成实质上包括两个联系紧密的过程，即形态发生和分化。

The traits of dedifferentiation and redifferentiation of the explants form H. sampsonii show that the calli the stem and leaf usually form buds at its parietal cells. In the presence of auxin, the parenchyma of the leaf gap at the node is initiated firstly, then, develops blastemata that form buds in a cluster on the node without callus. These show that the various parts ofthe herb differ greatly in cell initiation and organ differentiation.

研究元宝草外植体的脱分化和再分化的特点结果表明，茎段和叶片启动形成愈伤组织，其不定芽通常发生在愈伤组织的周边区，茎节叶腋的叶隙薄壁组织在激素的诱导下启动、分裂，不形成愈伤组织而直接器官分化成芽原基，并在节结处产生一圈成簇的不定芽，表明元宝草不同部位的细胞启动及器官分化调控存在差异。

3The roots,stems and leaves of Agropyron cristatum form special morphology and structure to adapt external environment.

3冰草根、茎、叶等营养器官形成了特殊的形态和结构与干旱外界环境相适应。

Therefore, the identification and characterization of floral organ identity genes in Buxaceae is critical in elucidating the gene evolution related to floral organ formation. Floral organ identity gene homologues of Buxus microphylla ssp. sinica were screened, and nine gene homologues of B.

根据前人的谱系关系研究，黄杨科很接近真双子植物基群第二次主要复制事件的时间点，因此鉴定黄杨科植物的花部基因，将有助於厘清调控花部器官形成基因的演化情形。

It undergoes the following stages, such as the clavated proembryo.the globular proembryo, the heart-shaped embryo and the torpedo -shaped embryo stage.

后经棒状原胚、球形原胚、心形胚、鱼雷形胚，至六月底，幼胚器官形成。七月中旬幼胚逐渐成熟。

The results of study show:1. White pulp and red pulp in parenchyma of spleen of embryo can be obviously discerned after 18 days. Periarterial lymphoid sheath and ellipsoid periarterial lymphoid sheath also can be obviously discerned in spleen of 4 days chicken. T, B lymphocytes in appendix basement of embryo emerge after 20 days. It is the initial shape of cecal tonsil. Crypt structure of conjunction of esophago and stomachus glandularis form obviously at 4 days. It is the initial shape of esophago tonsil. The germinal center firstly emerges in these three organs at 14 days. With the increase of day age, the characteristic structure peripheral immune organs gradually develop mature. Spleen achieve mature at 21 days and cecal tonsil at 35 days.2. IgM~+ and IgA~+ cells in spleen of embryo emerge at 15 days. IgG~+ cell, CD3~+ and CD8~+T lymphocytes of embryo emerge at 20 days. CD3~+, CD8~+ and IgM~+ cells in cecal tonsil of embryo emerge at 20 days. However CD4~+, IgG~+ and IgA~+ cells all emerge in 1 day age chicken out of crust. CD3~+, CD4~+, CD8~+, IgM~+ and IgG~+ cells in esophago tonsil of embryo all emerge at 20 days. However IgA~+ cells emerge in 1 day age chicken out of crust.3. The amount of T, B lymphocytes in peripheral immune organs increase follow with the increase of day age, and hold an upgrade tendency. The amount of T, B lymphocytes in spleen achieved stabilization at 21 days, and in tonsil of esophago and appendix at 35 days.

研究结果表明：1、在组织结构方面，脾脏实质内的白髓与红髓在胚胎18日龄后明显可辨，4日龄雏鸡脾脏中形成明显可辨的动脉周围淋巴鞘和椭球周围淋巴鞘；盲肠基部T、B淋巴细胞在胚胎20日龄时开始出现，即初步形成盲肠扁桃体；食管与腺胃结合处在4日龄时形成明显的隐窝结构，即食管扁桃体初步形成；14日龄时，三种器官中首次出现生发中心；随着日龄的增长，外周免疫器官特征结构不断发育成熟，脾脏在21日龄时达到成熟水平，盲肠扁桃体和食管扁桃体在35日龄时达到成熟水平。2、在T、B淋巴细胞出现时间方面，脾脏中IgM~+和IgA~+细胞在胚胎15日龄时开始出现，IgG~+细胞、CD3~+和CD8~+T淋巴细胞在胚胎18日龄时出现，CD4~+细胞在胚胎20日龄时出现；盲肠扁桃体中CD3~+、CD8~+和IgM~+细胞在胚胎20日龄时开始出现，而CD4~+、IgG~+和IgA~+细胞均在雏鸡出壳后1日龄时出现；食管扁桃体中CD3~+、CD4~+、CD8~+、IgM~+和IgG~+细胞均在胚胎20日龄时开始出现，而IgA~+细胞则在雏鸡出壳后1日龄时出现。3、在T、B淋巴细胞数量变化方面，外周免疫器官中T、B淋巴细胞的数量随日龄增长，整体均呈上升趋势。

In heterosporous plants, the microspores give rise to small male prothalli bearing male sex organs, and larger female sex prothalli bearing female sex organs.

在具异形孢子的植物中，小孢子形成具小的雄性器官的雄原叶体，而大孢子形成大的具雌性器官的雌性原叶体。

The macrofossil records indicate that, in company with the notable climate and environmental changes, the multicellu-lar metazoans and metaphytes experienced a series of important biological evolutionary incidents in this period, such as the organ and form differentiations, the growth innovations and the further diversification of biological structures and functions.

宏体化石的记录表明在这一时期伴随着显著的气候和环境变化，发生了一系列重要的生物演化事件，多细胞的宏观后生动、植物普遍出现了组织分化，器官形成和发育创新，以及生物结构和功能的进一步复杂多样化。

Although CP has been frequently used as a model teratogen and extensively studied in vivo during organogenesis, mechanisms of CP-induced teratogenicity have not been well understood.

虽然国外对CP的致畸作用做了大量的工作，但主要是对器官形成敏感期胚胎进行的体内研究，国内这方面的研究开展较少。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐