比较研究

The cause of macromastia is not well understood and may be related to the mistakes in gene expression during puberty or pregnancy. There are a lot of researches focusing on the molecular mechanism of breast cancer and lactation, but seldom on macromastia. The size of an organ is determined by the size of the cells and the number of the cells, which depends on cell division and cell death.

巨乳症的成因可能是由於青春期或怀孕期乳房发育基因的表现异常而造成，但目前的研究对此并没有很详细的研究，与巨乳症相关的研究大多集中於病患的心理生理评估及手术方法的比较，乳房发育的相关研究目前都集中於乳癌与泌乳退乳的机制。

Eleven major scientific problems on comparative metallogeny are proposed and the research method s are discussed.

小结了比较矿床学的研究现状、意义，提出了11个重大研究课题与研究方法，并展望了其研究前景。

Nonexperimental quantitative research is broad in scope ranging from status quo studies to ex post facto research, which may be causal---comparative or correlational in nature.

调查研究是一种使用范围很广的研究，它包括对现状的研究，以及自然状态下的因果比较或相关分析的事后回溯研究。

Moreover, we established the model of apoptosis induced by corticosterone and explored the effect of gangliosides, which is a active component in pilous antler, on this apoptotic cell model. The effects of gangliosides on neurotransmitter release, neuronal filopodia formation, calcium signal cascade and 5-HTl A receptor-ligand competitive binding were also studied. 2. Theory study: The viewpoint on brain and kidney in traditional Chinese medicine and that in Western medicine were comparatively studied. The essence of the relationship between kidney and brain in traditional Chinese medicine Subsequently, in combination with the analysis on the results in the empirical study, we discussed the essence of the relationship between kidney and brain in traditional Chinese medicine from the viewpoint about the feedback mechanism of hippocampus-hypothalamic-pituitary-adrenal.

体外实验采用糖皮质激素建立神经细胞凋亡模型，研究鹿茸有效成分的干预作用，并从神经递质释放、神经细胞丝状伪足生成、神经细胞钙信号途径、5-HT_(1A)受体配体竞争结合等方面进行机制探讨。2、理论研究：比较中西医学对肾和脑的传统认识以及现代研究，分析中医学中肾和脑的现代科学内涵，结合实验研究结果，从现代生物学海马—下丘脑—垂体—肾上腺轴负反馈机制的角度对中医肾脑相关理论的实质进行探讨。

ABSTRACT The emerging and development of resultative verb is a traditionnal problem of grammatical research which evoked heated discussions, and now it has not reached unanimity yet In this article, previous reseaches were summed up, and problems about the reseach of resultative verb were analyzied.

&动补结构的产生与发展&是语法研究的传统课题，也是历来讨论最多、争议最激烈而迄今为止尚未有定论的问题，本文全面总结了前贤时哲的研究成果，分析了目前在动补结构的研究中存在的问题，希望通过这个专题研究，对动补结构的产生、发展及相关问题有一个比较切合汉语发展实际的科学结论。

We explore the relation between structure and activity , structure and toxicity from electronic structure and three—dimensional conformation in order to provide theoretical foundations for predicting the activity and toxicity of these chemical compounds, researching into mechanism of action and choosing safener.

通过比较四种均三氮苯类除草剂的红外光谱特征吸收的实验值和计算值，并运用规范不变原子轨道法GIAO法在RHF/6-31G水平上计算出西玛津的δ~1H-NMR和δ~(13)C-NMR，与实验值的对比统计分析，结果表明：用RHF/6-31G优化的分子构型最佳，AM1法次之，考虑到优化时间和研究的需要，我们在研究均三氮苯类除草剂分子的结构与活性关系时，为了进行深入、精确的理论研究，采用从头算RHF/6-31G进行优化；而对于此类化合物的结构与毒性的关系研究时，更注重分子的量子化学参数的相对值而非绝对值，因而采用AM1的方法。

The study of this area has progressed correspondingly. However, some only discussed this topic theoretically, ignoring the practical aspects; others oversimplified the questions and measures, unsystematically and inaccurately.

目前关于大学生事务管理的研究也日渐丰富，但现在很多研究仅仅停留在大学生事务管理理论层面，另有一些对大学生事务管理面临的问题和对策的研究比较宽泛，浅尝辄止，研究还不够全面、系统。

First of all, this paper concludes the general research routine and procedures in wireless mesh networks and introduces related research methods and results of different procedures: firstly, it makes classification and comparison of the classic routing protocols in mobile ad hoc networks; secondly, it introduces several ways in which the classic ad hoc routing protocols can be modified to be used in the wireless mesh networks; thirdly, it makes detailed explanations of some typical routing protocols in each way above.

首先本文总结了无线Mesh网络路由协议的一般性研究路线，并按该研究路线的各阶段分析和总结了相关的研究方法与研究成果：先对移动Ad hoc网络的经典路由协议进行分类和比较；在此基础上总结了将Ad hoc路由协议应用于无线Mesh网络的几种主流的改进思路；最后对各种改进思路的代表性路由协议进行了分析和讨论。

The main contents include:(1) Survey on construction technologies of ecological river ;(2) Discussion on ecological restoration technologies in canalized river in china;(3) Comparative study on two kinds of filler m.

具体研究内容包括：(1)生态河道构建技术综述；(2)探讨我国渠化河道生态修复的方法；(3)抛填式生态河床两种填料的比较筛选；(4)优选材料构建的生态河床模型对污染河水处理效果的研究；(5)工程启动期与微生态系统初建期对污水处理效果的对比研究；(6)生态河床模型在冬季低温条件下对污染河水处理效果的研究。

Methods: Research methods such as document study, theoretical research andcomparative analyses are adopted in this article, attempting to synthetically analyze theimportance of humanities and social sciences education in higher medical colleges anduniversities. Questionnaire investigations are used to the study of curriculum setting inhumanities and social sciences education of domestic higher medical colleges anduniversities, the humanistic qualities of students, the acquisition of humanities and socialsciences, the attitude towards humanities and social sciences education.

通过文献研究、理论研究分析医学院校人文社科教育的重要性，从多方面对国内外医学院校人文社科教育进行分析比较；通过调查表的形式对46所全国高等医学院校的人文社科课程设置情况进行调查研究；通过调查问卷的方式研究某医学院校大学生的人文素质情况、对人文社会科学知识的掌握情况、对人文社科教育的态度等方面；最后分析并总结目前我国高等医学院校人文社科教育存在的问题，初步探索适合我国医学院校特点的人文社科教育模式。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了