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Literature Research The etiological factors of POF are not still clear. The changes of sites and numbers in X chromatosome, X; autosome translocations, a forkhead transcription factor gene (FOXL2) mutations, FRAXA premutations and inhibits gene mutations are found in POF patients, so genetic disorders have been thought to be involved. Irradiation, chemotherapy or pelvic operations can damage ovaries and cause ovarian atrophy and failure, so it is thought one factor of POF.

一、文献研究 POF的确切病因目前尚不清楚，从POF患者体内检测到X染色体上位点和数目的变化，X染色体与常染色体间的平衡易位，脆性X基因前突变，FOXL2基因突变，抑制素基因突变等，故认为POF发生与遗传因素有关；由于放射、化疗或盆腔手术等可损伤卵巢，导致卵巢萎缩，出现卵巢衰竭，故也是导致POF的因素之一。

According to the general process of enacting enterprise strategy and thebackground of the X enterprise ,this paper analysis the external environment and theinternal environment completely and systematically, and use the BCG matrix ,SPACEmatrix and SWOT matrix analysis method to make the developmental combine strategyof X enterprise as: market develop and product osmose strategy, product differentiationstrategy, integration strategy, coorperative strategy and avulse strategy.

本文按照企业战略管理的一般过程，根据为 X 企业制定发展战略的背景和目的，对 X 企业目前的外部环境和内部环境进行全面系统的分析，再利用战略管理理论中的 BCG 矩阵分析、SWOT 分析和 SPACE 矩阵分析，为面临动态竞争环境的 X 企业制定了以下发展战略组合：市场开发渗透战略、产品差异性战略、一体化战略、合作战略和剥离战略。

X ; // decrement x by one and returns the new value of x

将x的值减1并返回现在的x的值。

In the second part, we firstly give the definitions of the double inverse limit and some dynamical properties related, then we use the above way to study the dynamical relations between the systems and lim{X, f^g},σ_f^σ_g...

在论文的第二部分，我们模仿逆极限{X，f的定义，提出了双重逆极限{X，f^g的概念，并针对X上的两个交换的自映射f和g，类似定义了系统上的一些动力性质，并证明了系统与系统(？{X，f^g}，σf^σ_g之间在这些动力性质上的一些相关结果。

Xist and Tsix are imprinted in the extraembryonic tissues of mouse embryos so that they are expressed from the paternal and maternal X, respectively, resulting in the preferential inactivation of the paternal X.

Xist和Tsix在小鼠胚胎的胚外组织中是印迹的，Xist在父本X染色体上表达而Tsix在母本X染色体上表达，导致父本X染色体的优先失活。

Lighting setup are two KZ fixtures with each 8 x 54 W T5 (2 x Fili Purple / 2 x Narva blue / 12 x KZ New Generation).

KZ灯架， 8 x 54W T5HO (2斐济蓝/ 2 Narva蓝/ 12 KZ混合形新品)至少到现在，我还满意，没有想重用我旧缸的HQI

Lighting setup are two KZ fixtures with each 8 x 54 W T5 (2 x Fili Purple / 2 x Narva blue / 12 x KZ New Generation). So far I do not miss the shimmer of the HQI to much older picture

KZ灯架， 8 x 54W T5HO (2斐济蓝/ 2 Narva蓝/ 12 KZ混合形新品)至少到现在，我还满意，没有想重用我旧缸的HQI

The electrical transport properties in the zero magnetic field about the (1 -x) La2/3Ca1/3MnO3/xZn(NO3)2 system and the (1-x)La2/3Ca1/3MnO3/xFe(NO3)3 system have been given. We compare these results in three systems and simply give the qualitative indicant.

研究了(1-x)La_2/3Ca_1/3MnO_3 / xZn(NO_3)_2体系和(1-x)La_2/3Ca_1/3MnO_3 / xFe(NO_3)_3体系的零场电输运行为，并与(1-x)La_2/3Ca_1/3MnO_3 / xCu(NO_3)_2体系进行了比较，并简单定性解释了比较结果。

A weak inverse of S is an element x ∈ S such that x = xax, denoted by W the set of weak inverse s of a.

如果存在x∈S，使得x=xax，则称x为a的一个弱逆。

The main content of this paper as follows: The acidic strength, reaction temperature, reaction time of Chlorine-aluminate Ionic Liquids with different structure of cation on the activity of transalkylation of MN with TeMB and the selectivity of 2,6-DMN were studied. The optimum reaction condition was obtained: the molar fraction of AlCl_3 is 0.71, molar ratio of 2-MN and TeMB is 1, the amount of ionic liquid is 32wt%, reaction temperature is 20℃and reaction time is 8h using X-xAlCl_3 and X-xAlCl_3 as catalysts; the optimum reaction time is shortened 6h using Et_3NHCl-xAlCl_3 as catalyst.

本文主要研究了以下内容：分别考察了不同阳离子结构的氯铝酸盐类离子液体的酸强度、反应温度、反应时间等因素对MN和TeMB转移烷基化的催化反应活性和2，6-DMN选择性的影响，优化得到适宜的反应条件为：以X-xAlCl_3和X-xAlCl_3为催化剂时，AlCl_3的摩尔分数x=0.71，2-MN和TeMB摩尔比为1∶1，离子液体用量为32wt％，反应温度为20℃，反应时间为8h；以Et_3NHCl-xAlCl_3为催化剂时，反应时间缩短到6h。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。