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DCM071 three-phase digital electricity tester refers to relevant standards, controlling by high-speed SCM, multiplication circuit and integral A/D conversion can achieve synchronized measurement about real virtual value and frequency of three-phase voltage、current、power.

DCM071三相数字电量测试仪参照相关标准，采用多微高速单片机控制，由乘法电路及积分A/D转换实现同步测量三相电压、电流、功率的真有效值和频率。

The studyshows that Chetaev's model for mechanicalsystems with non-holonomic con-straints can be reduced to three essential factors:(1)a kind of direct sum ofjet bundles according to the constraints,(2)D′Alembert's principle,(3)pos-tulate of ideal constraints.The first among the three factors only has geomet-ric significance and the second is a fundamental physics principle independentof any constraints.

研究表明，非完整约束力学系统的Chetaev模型归结为三个要素：(1)射丛按约束的直和分解；(2)D′Alembert原理；(3)理想约束条件，其中(1)仅具有几何意义，(2)为与约束无关的基本物理原理，而(3)是对约束力学系统的限制条件。

Volcanic gas reservoirs of low permeability in the carboniferous of a basin are characterized by deep burial depth, complex genesis, many types, wide distribution and non-evident expressions in three-porosity log curves, as well as the variedvalues of density and compression wave of main four volcanic gas reservoirs (such as the basalt, andesite, dacite and rhyolite). So a number of effective methods based on three porosity log data cannot work in identifying the volcanic gas reservoirs of the carboniferous of the basin.

石炭系火山岩的低渗透气藏具有的埋藏深、成因复杂、类型多、分布广、三孔隙度曲线响应特征不明显等特点，并且主要的四种火山岩气藏：玄武岩、安山岩、英安岩、流纹岩的密度和纵波时差测井值差别较大，因此使基于三孔隙度测井资料的一系列识别气层的有效方法在该盆地石炭系火山岩气层的识别中无明显效果。

Confucius said: There are three kinds of beneficial friends and three kinds of damaging friends.

孔子说：有益的朋友有三种，有害的朋友也有三种。

Further bioinformatical analysis indicated that the three Y-box genes of lamprey, i.e., Lyb1, Lyb2, and Lyb3, encoded 331, 181, and 171 amino acids, respectively. The three amino acid sequences were homologically aligned with those from Ciona intestinalis, Danio rerio, Oryzias latipes, Takifugu rubripes, and Mus musculus by DNAMAN software.

采用DNAMAN软件，将七鳃鳗的3个Y-box蛋白氨基酸序列与海鞘、斑马鱼、清鳉、河豚鱼和小鼠Y-box蛋白进行同源性分析，结果显示他们共有一个保守的冷休克结构域，其中包含两个RNA结合基序RNP-1和RNP-2，表明获得的Lyb基因属于Y-box 基因家族成员。

"Mainlander book","can not recall Shukui" and the "ugly or romantic," Zhang Wei recent years has created a three novel, the authors believe that these three films constitute "the city's civil, and then to urban impact" clues -- the "mainlander book," hope away from the "modern civilization" where to find natural quiet life aspirations "can not recall Shukui" to the moral degradation, produced debauch modern city issued a fierce protest and criticism,"can not recall Shukui" writers began into cities, from cities to find a spiritual home.

外省书》、《能不忆蜀葵》和《丑行或浪漫》是张炜近几年先后创作的三部长篇小说，笔者认为这三部作品构成了"由城市回归民间，再到城市冲击"的线索——《外省书》中希望在远离"现代文明"的地方寻找自然宁静的生活的愿望，《能不忆蜀葵》向道德堕落、浮华糜烂的现代城市发出了激烈的抗议和批判，《能不忆蜀葵》中作家开始走进城市，从城市寻找精神家园。

The variable geometry truss mechanisms have been studied extensively and systematically by this project. The research plan has been completed all sidedly, and expected results have been obtained. Three new kinds of combination decahedrons and a new class of variable geometry truss mechanism, which is composed of an octahedron and three tetrahedrons connected in parallel form, are proposed. The position analyses for decahedrons, dodecahedrons, triple-octahedrons, combinations decahedron and a new type of structure of variable geometry truss mechanisms are presented by introducing additional extra linear displacement sensors and using resultant elimination and homotopy continuation algorithms. The method of kinematical analysis of variable geometry truss mechanisms is established.

课题组对变几何桁架机构进行了深入的研究，全面地完成了研究计划，取得了预期的成果；提出了三种新的十面体组合机构以及由一个八面体和三个四面体组成的新型变几何桁架机构的结构形式；应用结式消元、附加传感器和同伦方法等提出了十面体、十二面体、三重八面体、组合十面体和新型变几何桁架机构的位置分析方法；建立了变几何桁架机构运动分析的一般方法；建立了简洁的凯恩和拉格伦日动力学的模型；应用有限元和子结构方法，提出了变几何柞架机构弹性动力学模型，导出了逆动力学方程的显式形式；设计和研制了一台可折叠的八面体变几何杵架机构装置等。

The incidence and severity of enamel decalcification in orthodontic treatment either in three groups or in the number of the patient's teeth of three groups were evaluated before and after treatment.

目的：了解用固定矫器治疗后的牙釉质脱矿的发生率及严重程度，并评价用75%NaF处理牙面和使用含氟牙膏后的结果。

In the early stage of the genetic algorithms, the three genetic mechanisms are used both in integer part and decimal part, so that the genetic algorithms have stronger global search ability, keep the population diversity efficiently and avoid falling into local extremum. In the later stage of the genetic algorithms, the three genetic operators are used in decimal part, so the genetic algorithms have stronger local search ability and fast convergence ability.

在遗传算法开始阶段，该编码算子进行整数部分和小数部分的遗传操作，使得遗传算法在早期具有很强的全局搜索能力，避免陷人局部极值；在后期进行小数部分的遗传操作，使得遗传在后期具有很强的局部搜索能力，能够很快地搜索到全局极值。

By making comparison between three-step method and four-step method of Gram stain,the author found that the stain progress of three-step method is simple,and is easy to hold decolor time.

对革兰氏染色三步法和四步法进行了试验比较，发现三步法染色过程操作简单，脱色时间易于掌握，便于学生操作和控制，且染色效果较好，明显提高了实验效率，值得在教学中推广使用。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。