二中心的

The full space calculation model, which suits for the asymmetric structure sometimes even including air below the surface of medium, can enable simulative result to approach real one. The FDTD algorithm based on the mixed ABCs is proper to calculate the transmission line where the electromagnetic wave is transmitted in order to send electromagnetic energy along central conductor. The calculation efficiency will be raised if the PML absorbing boundary condition is set on both planes of transmitting direction and so is the MUR two-order absorbing boundary condition in the other planes.

全空间计算模型是适合所有的不对称结构的待研究体的，而且包括了介质下面的空气部分，使仿真更加的接近实验真实情况；基于MUR-PML混合吸收边界条件的时域有限差分法非常适合计算传输线这种结构，因为传输线是传送电磁波的，电磁能量主要是沿着中心导带行进，因此在两个传输端面上设置PML完全匹配层吸收边界条件，在其他面上设置MUR二阶吸收边界条件，会大大提高计算效率，而且计算结果与XFDTD仿真软件计算结果相比较，基本趋于一致。

It is understood that the world's second largest sports retailer and manufacturer France Decathlon has decided from 2005 to 2008 period, will be centered in southern China, to focus on the expansion of Beijing-based North China, 2005 18 in Beijing 4-1000 m2, ranging from the concept of shop, shop standards, and in North China to establish a huge commercial network, taking into account regional advance to the West; Carrefour in Beijing, Shanghai, Guangzhou and Shenzhen central cities in the open 12 new stores, while plans to open 100 new stores and additional Concordia 10-15 Champion supermarket fresh.

据了解，世界第二大体育零售商和制造商法国迪卡侬已决定二零零五年至08年期间，将集中在南部的中国，将重点放在扩大总部位于北京的北中国， 2005年18在北京4-1000平方米，从概念店，店标准，并在北中国建立一个庞大的商业网络，同时考虑到区域事先向西方；家乐福在北京，上海，广州和深圳的中心城市开设12个新的商店，同时计划开放100个新的商店和额外康科迪亚10月15日冠军超市新鲜。

Critical angle of refraction - semi-circular cylindrical mobile light source, the incident angle change the size of refraction angle to change at this time, when the refraction angle = 90 degrees, which is critical at this time angle of incidence angle, the critical angle of water at 40 degrees large about anything mobile source of water in the water screen that is a reflection of light, a phenomenon that total reflection.

光折射的临界角定义：光折射角=90度时，入射角即为临界角，按二方法，将半导体激光光源去掉铁夹，吸附在右下角的铁板上入射光对准中心，即产生折射光线，沿半圆形柱面移动光源，改变入射角的大小，这时折射角也改变，当折射角=90度时，这时入射角即为临界角，水的临界角大的在40度左右，再做移动光源在水中的水屏即出现反射光线，这种现象称全反射。

As the Berkman Centre for Internet and Society at Harvard University laid out in a study commissioned last year by the FCC, over the past decade almost all developed countries have extended some kind of common-carrier arrangement to broadband access.

如同哈佛大学的Berkman互联网与社会研究中心在去年的一项由FCC委任的研究项目中清晰地提出一样，在过去的二十年里，几乎所有的发达国家都已经扩展一些类别的公共载体安排以适合于宽带接入。

Tridiagonal block matrix elemination and sweep algorithm is successfully applied to solve the large matrix involved; central difference method is supplemented to Houbolt method to form a time integration method with estimation and correction, to solve the time integration of second order implicit non-linear equation; simplification of system equation by decoupling between the physical coordinates x and y further improves the calculation accuracy and speed.

其中：成功地引入块三对角矩阵追赶法求解上述问题构成的大型矩阵；提出中心差分法+Houbolt法的预估计—校正时间积分法，以解决二阶隐式非线性方程的时间积分问题；系统方程在物理坐标x和y上的"解耦"简化，使计算速度和计算精度得以进一步的提高。

For patients of CT-aided acupuncture guoup, acupuncture needles were inserted into the subcutaneous tissues around the focus-projection scalp area displayed by CT,with the needle tips towered the center of the projection .

治疗组以CT所示病灶在同侧头皮的最近距离的投射区的周边为针刺部位围针治疗，方向皆刺向投射区的中心；对照组采用传统针刺病灶侧头皮言语一、二、三区(根据失语症的性质分别选取)的方法治疗。

According to the some properties of the differentiation ,I found that the symmetry of the graph is closely related to the first-order differentiation and the second-order differentiation .from this ,I search for a way to identify the symmetry of the functional graph for the direct line or the central symmetry of the functional graph for the some dot .

摘 要：利用导数的一些性质，发现了函数图象的对称性与函数的一阶、二阶导数的密切关系。根据这些关系，找到了一种判定函数图象是否关于某一直线对称或关于某点成中心对称的方法。

This makes Ni-W-P powder more suitable for partial hydrogenation of dienes. The kinetic results suggest there are some different between the active sites of Ni-P and Ni-W-P powder. DSC, XRD and EXAFS results suggest that the tungsten codeposition makes Ni-W-P powder more amorphous than Ni-P powder.

动力学结果表明在两种合金微粒上，不仅环戊二烯与环戊烯的相对配位能力不同，而且它们各自的反应速率常数也不一样，表明非晶态Ni-P、Ni-W-P合金微粒的催化活性中心存在着一定的差异。

The purpose of this study is to explore the subjective difficulty of clinical preceptors in student teaching and the variants of different backgrounds that might influence the subjective difficulty of clinical preceptor in student teaching. This study is a quantification study carried out by questionnaires. Research subjects of this study are care workers in two regional teaching hospitals and three medical centers in Taipei who acted as clinical preceptor responsible for at least one student nurse within recent six months. The effective response rate of questionnaire was 93.08%(out of 130 questionnaires in total).

本研究目的是探讨临床辅导员自觉的教学困难，并探讨不同背景变项会影响临床辅导员的教学困难的情形，本研究为量性研究，以问卷调查为方法，以台北县市二家区域教学医院及三家医学中心，近半年内临床工作期间担任一位以上专科层级护生实习之临床辅导员的护理人员为研究对象进行方便取样，根据自拟临床辅导员自觉教学困难问卷为研究工具，发出样本为130份，实际回收样本为123份，有效问卷回收率为93.08%。

Two million of them in a recent year spent most of their parents' workdays in day care centers.

有工作的母亲的孩子多达一千二百万是学龄前儿童，他们中的两百万在父母工作的时候在日托中心度过。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。