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The icon is slippery, ensnaring the unwary in its paradox of no beginning, no end, no center. Or, all beginning, all end, pure center.

这个符号令人难以捉摸，它诱使粗心者陷入没有开始，没有结束，也没有中心的，或者，都是开始，都是结束，完全是中心的困境之中。

The icon is slippery, ensnaring the unwary in its paradox of no beginning, no end, no center. Or, all beginning, all end, pure center.

这个符号令人难以捉摸，它诱使粗心者陷入没有开始，没有结束，也没有中心的，或者，都是开始，都是结束，也完全是中心的困境之中。

The icon is slippery, ensnaring the unwary in its paradox of no beginning, no end, no center. Or, all beginning, all end, pure center.

这个图腾很滑头，它诱使粗心者陷入其没有开始、没有结束、也没有中心，要么，全都开始、全都结束、只有中心的困境之中。

Tianjin, one of the four municipalities directly under the Central Government, is the door of Beijing, capital of China. In 1997, the State Council described her as the economic center of the Bohai-Sea-Ring area, as well as an important economic center of northern China. This function description has the following meanings: on the one hand, the development of Tianjin must eradiate the Bohai-Sea-Ring area, the north of China and even the whole nation; on the other hand, it requests Tianjin to step up to a higher position, function and influence in multinational regional cooperation, and hence to form an important base and green channel on economy cooperation in northern China.

天津作为中国四大直辖市之一，是首都北京的门户。1997年国务院将其定位为环渤海的经济中心和我国北方重要的经济中心，这一功能定位意味着：一方面要求天津的发展要辐射于环渤海地区，辐射于我国北方地区乃至辐射于全国；另一方面要求提升天津在跨国区域合作中的地位、作用和影响，形成中国北方对外经济合作的重要基地和绿色通道。

The above analysis suggested that Yunnan province is a distribution center as well as a gene center of Eriobotrya in China.

因此云南是我国枇杷属植物的现代分布中心和基因中心。

CD8~+ cell is the main T lymphocyte subset in spleen, and B lymphocyte mainly is IgG~+ cell, moreover the amount of these B lymphocytes could exceed CD3~+ T lymphocyte subset after 7 days. CD8~+ cell is the main T lymphocyte subset in tonsil of appendix, and B lymphocyte is IgM~+ cell, and the amount could exceed CD3~+ T lymphocytes after 35 days. After 21 days, B lymphocytes in esophago tonsil are the main IgA~+ cells and the amount exceeds CD3~+ lymphocytes. The amount of CD4~+ lymphocytes is more than CD8+ lymphocytes.4. CD3~+、CD4~+ and CD8~+ T lymphocytes in spleen mainly distribute in periarterial lymphoid sheath. However IgM~+、IgG~+ and IgA~+ cells mainly distribute in ellipsoid periarterial lymphoid sheath and germinal center. T lymphocytes in appendix tonsil mainly distribute in middle and inferior part of mucous and the B lymphocytes mainly in middle and mucous between 4~7 days. Whereafter T, B lymphocytes equably distribute in mucous. CD4~+ cells arrange tightly and mainly occupy the central part in aggregates of T lymphocytes in esophago tonsil and CD8~+ lymphocytes mainly distribute in periphery. Meanwhile B lymphocytes encircle the periphery of aggregates of T lymphocytes. The aggregates of B lymphocytes is mainly the germinal center with lots of IgM~+、IgG~+ and IgA~+ cells. Meanwihle T lymphocytes encircle the periphery of aggregates of B lymphocytes.5. There is an intimate relationship between the development of tissue structure of peripheral immune organs and lymphcytopoiesis. The maturation of tissue structure is stimulated by the immigration of lymphocytes and the mature tissue structure provides place where lymphocytes grow mature and functionate.

脾脏在21日龄时达到稳定，食管扁桃体和盲肠扁桃体均在35日龄时达到稳定；脾脏中T淋巴细胞亚群以CD8~+细胞为主，B淋巴细胞则以IgG~+细胞为主，并在7日龄后数量超过CD3~+T淋巴细胞；盲肠扁桃体中T淋巴细胞亚群以CD8~+细胞为主，B淋巴细胞以IgM~+细胞为主，并在35日龄后数量超过CD3~+T淋巴细胞；21日龄后，食管扁桃体中B淋巴细胞以IgA~+细胞为主，数量超过CD3~+细胞，CD4~+细胞的数量多于CD8~+细胞。4、在T、B淋巴细胞组织定位方面，脾脏中CD3~+、CD4~+和CD8~+T淋巴细胞主要分布在动脉周围淋巴鞘中，而IgM~+、IgG~+和IgA~+细胞主要分布在椭球周围淋巴鞘和生发中心中；4～7日龄时，盲肠扁桃体中T淋巴细胞主要分布在粘膜固有层的中下部区域，而B淋巴细胞则主要分布在中上部区域，随后各日龄T、B淋巴细胞均匀地分布在粘膜固有层中；在食管扁桃体的T淋巴细胞聚集物中，CD4~+细胞紧密排列，主要占据中央部位，CD8~+细胞主要散布在外周，同时B淋巴细胞又环绕在整个T淋巴细胞聚集物的外周；B淋巴细胞聚集物主要为生发中心，其中存在大量IgM~+、IgG~+和IgA~+细胞，同时T淋巴细胞又环绕在整个B淋巴细胞聚集物的外周。5、外周免疫器官的组织结构发育和淋巴细胞发生之间存在密切的关系，淋巴细胞迁入淋巴器官刺激组织结构的发育成熟，同时成熟的组织结构又为淋巴细胞发育成熟并行使功能活动提供场所。

The earliest and reliable Castanopsis fossil records date back at least to Eocene, and subfamily Castaneoideae fossil records found from Paleocene, it is indicated that appearance of Castanopsis is not later than Paleocene . All fossil records of Fagaceae and Castanopsis report from the Northern Hemisphere and their main distribution regions are in the Northern Hemisphere . It can be concluded that the Northern Hemisphere is the center of origin of Fagaceae and Castanopsis . However, owing to the discrepancy between fossil data and results of modern botany research as well as scarcity of fossil data from key area, precise center of origin of Castanopsis cannot be inferred.

栲属在地质历史上有着比现在广泛的分布，最早、最可靠的栲属化石记录发现于始新世地层，栗亚科化石在古新世就有发现，化石记录表明栲属起源的时间不晚于古新世，所有的壳斗科及栲属的化石都发现于北半球，现代分布也主要在北半球，壳斗科及栲属起源于北半球可以确认，由于化石证据与现代植物学的研究结果有较大差异以及关键地区化石证据的不足，具体的起源地尚不能肯定。

4Histological examination of the capsular bags: It could be seen in group 4 that a small amount of LECs at the capsular equator proliferated and migrated to the posterior capsule, forming a thin soemmering ring in the periphery of the capsular bags, forming thin fibromembrane which embodied monolay metaplastic fibroblast-like cells in the center of the capsular bags, or with no cells or cortical material in the center of the capsular bags.

囊袋组织学检查：HSV-TK+GCV组可见少量赤道部晶状体上皮细胞(lens epithelial cells， LECs)增殖并向后囊膜迁移，在囊袋外周部形成稀薄的soemmering环，在中央部无细胞和皮质，或仅形成单细胞层纤维膜。

Firstly, this article in view of the CATIA CLSF, elaborated this software post-processing way, the operating mode of the three principles, and has given the explanation to this software overall constitution; Secondly, after having analysised and researched thoroughly how the CATIA/CAM module creates the APTSOURCE file and its format, the rules of CNC milling machining center MODIMILL 4L, FIDIA PowerXP20system and the coordinate transformation of the machine tool, we programmed the code of CMSPP special post-processing software and compiled the interface based on the dialog box pattern which the fine outward appearance, is easy to operate; Finally, from machining practice, the NC program by the post-processing program can be run in the machining center to machine the part.

首先，本文针对CATIA刀位文件的特点，提出了该软件的后处理方式以及软件运行的三条原则，并对该软件的总体构成作了阐明：其次，本文对CATIA／CAM模块生成的APTSOURCE文件格式、FIDIA PowerXP20数控系统的规则以及MODIMILL 4L铣削加工中心坐标转换数学模型进行了深入的分析与研究，在此基础上用VC++6.0语言编写了CMSPP专用后处理软件的算法代码，并且基于对话框模式编写了外观精美、易于操作的功能界面；最后，通过实例验证表明：开发的后置处理软件所生成的数控加工程序能够在加工中心上运行并能进行有效地加工。

There was a center zone of dense yolk substance in the zygote, and fingerlike yolk column were given off from the center zone, and varying size yolk granules filled in the yolk column.

受精卵有致密的中心区，由此向周围发散出呈指状突起的卵黄柱，卵黄柱内充满大小不等的卵黄颗粒。

It is suggested that TDS can be used as a new method for the analysis of pedogenesis and climatic change.

总之，热处理过程中磁化率的变化能非常灵敏地反映磁性矿物的转化情况，而且，这种转化往往与样品所经历的土壤化作用强度密切相关，因此，TDS可做为分析成土作用强度和古气候变化的一种新方法。

Therefore, in this chapter, I will research into the conflict and contradiction of the paternity. Also, in this novel, the father's behavior of "He who loves well chastises well." is quite suspicious, one of the reasons is that the father thought his son belonged to him. And then, this thesis quoted Lacan's theory to touch upon that someone who has accepted the concept of patriarchal society, he will be influenced for his whole life. That also reveals that human being has no choice sometimes in this society.

因此本章会先就父子关系的冲突与矛盾做深入的探讨，小说中的父亲似有对儿子爱之深责之切的行为，其原因可能在於父亲将儿子视为所有物所致；其次，论文将引用拉冈相关理论，讨论在父权社会中，不论身分为何，只要是已受父权社会观念根深蒂固影响的人物，终生都将受其所苦，此也揭示出人生存於社会上的无奈。