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On the other hand, equivariant algebraic topology concerns the study of algebraic invariants of space with group actions. It is really a study of symmetries on spaces, and has always occupied a central role in mathematics.

在另一方面，等变代数拓扑关注于带有群作用的拓扑空间代数不变量的研究，其更深刻的本质在于对空间对称性的揭示，因此从来都在数学研究中占有重要的地位。

The study provided some data to support laparoscopic ALIF, the study is too small to be considered definitive, said Scott D.

美国Emory医学院脊髓中心主任，同时也是整形外科教授的Scott D。

It is not how much time you allocate for study that counts but how much you learn when you do study.

重要的不是看你在学习上分配了多少时间，而是看你学习时学了多少东西。

It is not how much time you allocate for study that counts byt how much you learn when you do study.

重要的不是你花多源程序时间来学习，而是当你学习时你到底学到了多少东西。！

This study analysised the condition of Xinjiang's petroleum resource and made an evaluation and it points out that the development of petroleum and natural gas of Xinjiang is still in the developing period in which it aims at discovering the petrol field and increasing its reserves.Although it has a great exploring potential,because of its geograghy limitation and a lack of exploring funds,the exploring level is till low,even lower than the everage level of the whole country. The study is based on theories of industry distributions,its concentration,macroscopic analysis,government regulations and continuing development.From microcosmic and macroscopic aspects,it scientifically and systematically analyses the problems in the development of petroleum industry in Xinjiang.It points that the developments of middle and upper reaches lack a balance and have no rational industry structures.So it is hard to form an integral industry chains.Moreover,the upper reach covers a too much large proportion in the development,so it can not give a strong impetus to other industries.Based it,the paper points the industrial concentration of Petroleum Chemical Products Manufacture of Xinjiang should be enhanced and Input to Petroleum Chemical Products Manufacture of Xinjiang should be increased.Due to a lack of an established fair and competitive market and government's perfect laws and regulations on petroleum industry,it points that the phenomenon of mixed operation has become common in monolopied business and competitive business,so the systems of petroleum industry needs to be restructured.It states clearly that the country should take the development and benefits of Xinjiang's economy into consideration when making strategies for petroleum development .Besides,the allocation of profits between the center and the local should be well arranged so that we can guarantee the profits of Xinjiang ,considered as a resource area.It also reveals that we should not only overcome limitations of resources,environment,economy and technology on continuring development,but also we should deal with some realistic problems well.For instance,contradictions between the concept of limited resource and continuing development,the relationship between petroleum industry's own features and continuing development,the contradictions between the limits on supply of petroleum and the need of future development of continuing resource ,outdated petroleum technology and the need of advanced technology for continuing development,tremendous damages to environment and requirements of environment protection for continuing development and Xinjiang continuing economic development,outdated policy of industry and continuing development,the relationship between continuing development of Xinjiang petroleum industry and continuing economic development of Xinjiang.

本研究以产业布局理论、产业集中度理论、灰关联分析理论、政府规制理论、可持续发展理论为依据，从微观、宏观两个层面，科学、系统、全面地分析新疆石油产业的发展问题，指出：新疆石油天然气目前仍处于油气田发现和增储的主要发展阶段，开发潜力巨大，但由于地质原因及勘探投入的不足，石油天然气探明程度偏低，低于全国平均水平；新疆石油产业产业结构布局不合理、上中下游发展不平衡，难以形成完整的产业链条，对工业的带动力与其本身具有的经济总量很不匹配；新疆石油开采业和石油加工业属于高度寡头垄断的市场类型，新疆石油化工业属于竞争型的市场结构，要想石油产业对新疆经济有较强的带动作用，新疆石油化工业必须上升到一定的层次和规模，在提高规模的基础上，提高新疆化工业的产业集中度；新疆石油加工业和化工业与农业呈现较高的关联度，加大对石油加工业和化工业的投入，对新疆经济的协调发展有着深远的影响；政府要从石油产业本质特征和发展趋势为着眼点，实施规制改革，分开政府规制政策的制定部门和监管部门职能，建立健全石油产业法律法规体系，对垄断性业务和竞争性业务实施分类规制；国家石油发展战略的制定应兼顾新疆区域经济的发展和利益，应切实处理好新疆与中央的利益分配，切实保证新疆作为资源产区合理的资源收益；新疆石油产业要想得以可持续发展，不仅要克服影响可持续发展的资源、环境、经济和技术等客观因素，还要处理好观念、需求、政策等诸多主观因素。

In this paper, we mainly study the alternating group A_4 actions on spin 4-manifolds. First we discuss the special action of A_4 on K3 surfaces of Fermat type, we compute the fixed points set of this action and some invariants of the group action, also we get some topological properties. Then we study the A_4 actions on general K3 surfaces and obtain some similar results.

本文主要是以交错群A_4在K3曲面上的作用为研究对象，从Fermat型K3曲面上的特殊的A_4作用出发，得到了Fermat型K3曲面上A_4作用的不动点，利用不动点集计算了群作用的一些不变量并得到了相关的拓扑性质，在此基础上进一步把其中的一些结果推广到一般情形下的同伦K3曲面上。

This article mainly take the cyclotrimethyl, the aluminite powder as well as their mix dust as the object of study, used 1.2 liter Hartmann tubes to conduct the experimental study to their detonation characteristic.

首先拒绝软件翻译，如果多人帮忙，选择最优一人赠送40金币，摘要如下，谢谢各位！本文主要以黑索金、铝粉以及它们的混合粉尘为研究对象，利用1.2升哈特曼管对它们的爆炸特性进行了实验研究。

How to build the ambry that be at ease to consume an environment at present, already caused the attention of the personage inside ambry course of study and consumer, yao Liangsong says president of ambry of clique of Europe of executive chairman of committee of major of ambry of countrywide business association, Guangzhou, Disorder of environment of competition of ambry industry market and issue of care of can of ambry environmental protection, be the problem that a few when place of Chinese ambry course of study is faced with urgent need solve.

目前如何营造放心的橱柜消费环境，已引起橱柜业内人士和消费者的关注，全国工商联橱柜专业委员会执行会长、广州欧派橱柜董事长姚良松说，"橱柜行业市场竞争环境混乱和橱柜环保堪忧问题，正是中国橱柜业所面临的几个迫切需要解决的问题。"

Study difficulty means an abnormal phenomenon. the normal children of amentia sense organ, has not reached the required level complying with their intelligence in study grade yet although depending on the common school education.

学习困难是指那些感官正常又无显著智力缺陷的儿童依靠通常的学校教育，学习成绩尚未达到其智力所及水平而出现的一种现象。

Sample selection criteria for inclusion in our study were as follows: admission to our study, the course was less than 3 weeks, no history of prior stroke. Accelerate hypertension, severe disease of lever, kidney heart, malignant tumor, the history amentia or psychosis, respiratory failure were excluded. 80 patients were randomized divide d two groups :one control group and one rehabilitation group. Interventions Traditional neurology therapies were given to all patients.

患者 连续入院年龄在40～80岁男性或女性脑梗死或出血患者，病程不超过3个星期，既往没有脑卒中病史，无活动性肝病，肝功能不全，无充血性心力衰竭，无恶性进行性高血压，无恶性肿瘤患者，既往无痴呆病史，聋、哑人不能入组，且患者愿签署知情同意书，生命体征稳定在一周内，有肢体功能障碍。80例病人被随机分配到康复组和对照组。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。