有四种

The paper designs and makes a kind of active power filter experiment device with four use main circuit and without conformer.

作者设计、制作了一种不用变压器、采用四重化主电路实现的120kVA有源电力滤波器实验装置。

Over the years various kinds of both bench and stand-mounted countershafts were available: one model of bench countershaft featured a four-step final-drive pulley with a "fast-and-loose" drive from the motor (which gave the effect of a clutch) whist the other dispensed with this arrangement and was driven directly from the motor by what the makers described as a " special joined V-belt ".

多年来各种都替补和备用安装countershafts有：一种模式的板凳副轴功能的四步最后驱动滑轮的"快速和宽松"的电机驱动器惠其他免除这一安排，并直接驱动电机的制造商所形容为"特别加入V带"。

In view of the above steps a second phenomenon, clone the operating system is to store the default camera driver in C: \ Windows \ Driver \ Camera \ 301P the following folder, when you click on the new CD-ROM drive to install the camera, the system will not prompt already exists there and the camera drivers to uninstall this driver, please find this folder and removed; step II, first to install a new camera driver, and then plug in the camera loaded with hardware, the installation is complete restart the computer after normal use; step three, repeat the above two steps do not directly click on the new CD-ROM installation the latest drivers, plug in the camera after the system detects new hardware and auto-complete loading hardware drivers; step four, entered the Device Manager, can see the image processing equipment has been successfully installed, but when you open the "AMCAP" Preview images can not be preview, black and white, black phenomenon; five steps to the right mouse button on the image processing equipment "Vimicro USB PC Camera (ZC0301PL)" update driver, a dialog box appears choose "from the list or designated as the location of the installation steps to choose the next six to choose "Do not Search" and enter "to install from the floppy disk interface.

针对以上第二种现象步骤一、克隆操作系统是将摄像头驱动默认存放在C：\Windows\Driver\Camera\301P文件夹下面，当你点击新的摄像头驱动光盘安装时，系统不会提示已经存在有摄像头驱动并把此驱动卸载，请把这个文件夹找到并删除掉；步骤二、先安装新的摄像头驱动，再插上摄像头装载硬件，安装完成后重新启动电脑后可以正常使用；步骤三、不需重复以上两个步骤，直接点击新的光盘安装最新的驱动，插上摄像头后系统检测到新硬件，并自动完成硬件驱动装载；步骤四、进入到设备管理器中，，可以看到图像处理设备已经成功安装，但当你打开"AMCAP"预览图像时会出现无法预览、白屏、黑屏现象；步骤五、把鼠标右键放在图像处理设备的"Vimicro USB PC Camera（ZC0301PL）"更新驱动程序，出现对话框后选择"从列表或指定为位置安装步骤六选择下一步后选择"不要搜索"，进入"从软盘安装界面。

The task given to our office, being the only non-Korean architects on this project, is to redesign a number of the pedestrian tunnels and to give new identities to these infrastructural pieces which previously have not been thought 'designable' .

作为参与此项目的唯一境外事务所，我们的任务是重新设计其中四座行人隧道，并且赋予给这些之前不被认为有设计潜力的基础设施一种新的形象。

In Autism: Explaining the Enigma (2003), Uta Frith, a leading developmental psychologist at University College London, says that among those with the most severe autistic symptoms the ratio of men to women is four to one, rising to 15 to one among those with Asperger's syndrome (a variant in which autistic behaviours are less extreme and verbal ability is higher).

在《孤独症之谜试解》（Autism： Explaining the Enigma，2003年出版）这本书中，伦敦大学学院的著名发育心理学家Uta Frith认为，在有严重的孤独症症状的人中，男女比率是四比一，而在患阿斯伯格综合症（症状较轻的一种孤独症，患者的语言能力较好）的人中，男女比率是十五比一。

The updating algorithm of Strapdown matrix is one of the crucial techniques of SINS. There are several kinds of attitude updating algorithms of SINS, such as direction cosine algorithm and quaternion algorithm.

捷联矩阵更新算法是捷联系统的关键技术之一，捷联惯导系统姿态算法有欧拉角法、方向余弦法、四元数法和圆锥补偿算法等几种方法。

Elementalist: A Mage who has a kinship with nature becomes an Elementalist, able to control and manipulate the four elements of Fire, Ice, Light and Shadow.

元素使：法师有血缘关系与自然成为一种元素使，能够控制和操纵的四要素的火，冰，光线和阴影。

Elementalist:A Mage who has akinship with nature becomes an Elementalist,able to control and manipulate the four elements of Fire,Ice,Light and Shadow.

元素使：法师有血缘关系与自然成为一种元素使，能够控制和操纵的四要素的火，冰，光线和阴影。

Elementalist: A Mage who has a kinship with nature becomes an Elementalist, able to control and manipulate the four elements of Fire, Ice, Light and Shadow She primarily resorts to long-range attacks, blanketing large areas with damage An Elementalist often specializes in one specific element, fully embracing its characteristics At level 48, an Elementalist awakens as an Archmage

元素使：法师有血缘关系与自然成为一种元素使，能够控制和操纵的四要素的火，冰，光线和阴影。她对远程攻击的要旅游胜地，地区大面积造成伤害。一个元素使常常专注于一个特定的元素，充分融入其特性。48小时，一个元素使觉醒水平作为一个法师。

Evolution on land produces more bizarre beasts lied the sail-backed, super-predator, the Dimeterodon, the half-reptile, half-mammal Gorgonopsid and the Euparkeria, a finny reptile whose descendants will one day become dinosaurs.

四米长的海蝎子，十尺长并长有狗状头骨的哺乳动物，还有如人类头般大的巨型蜘蛛，以上提到的并非是在恶梦才会见到的生物，而是在恐龙出现前，曾经占领地球中的几种动物。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐