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First the math theory of machining simulation is studied, and the set structure of NC machining simulation system whose components, including time, input, output and so on, are defined. Hereby we set up the hierarchy structure, the logical structure, the static model and the dynamic model of simulation system. The construction method of sweep entity of cutter and rotation parts is researched, and their differential geometry invariants are calculated. NC code is unscrambled, and the recursion division arithmetic of time segment is put forward, which is the driven data of the movement or rotation parts. The CLDATA should be interference-free. To examine if there is interference between cutter flank and the work piece, an arithmetic that discussed the existence of intersecting curve between them is put forward. To examine if there is interference between two turrets, an arithmetic that discussed the existence of intersection set between two polygons is put forward.

首先研究加工过程仿真的数学基础，然后定义数控加工仿真系统的集合结构及时间集、输入集、输出集等概念，建立加工仿真的层次结构和逻辑结构，阐述双刀车削仿真系统的静态模型和动态模型建立方法，分析刀具扫描体和旋转部件扫描体的建立方法及其微分几何性质；研究NC代码解读技术和双刀加工时间段递归子分划技术，为驱动各仿真单元作数据准备；通过讨论后刀面和工件表面交线的存在性判断刀具后刀面与工件间是否干涉，通过求多边形的交集判断刀架与刀架是否干涉。

The motherboard is introduced, and the CPU and its components—the control unit and the arithmetic/logic unit—are described.

主板被介绍，和处理器和它的成份-控制单位和算术/逻辑单位-被描述。

The processor consists of two parts :Control unit and Arithmetic/logic unit , the two components are connected by a kind of electronic roadway called a bus.

该处理器包括两部分：控制单元和算术/逻辑单元，两个组成部分是通过一种被称为总线的电子线路连接起来。

Wanna talk about the Arjun and how it was rejected by India's own military as a failure or the "indigenous" LCA that won't go anywhere without key components from the West?

想谈谈阿琼还有它怎么被印度军队自己作为失败而拒绝的吗？或者"国产"的LCA没有西方的关键部件就无路可走？。。。

Mouse: When people moved to the mouse, the computer screen will have a arrow pointer with mobile and can be very accurate to refer to the cutting refers to the location, and fast on-screen positioning, it is people use computers one of the indispensable components.

鼠标：当人们移到鼠标时，电脑屏幕上就会有一个箭头指针跟着移动，并可以很准确切指到想指的们位置，快速地在屏幕上定位，它是人们使用电脑不可缺少的部件之一。

Of the 12 bisexual Artemia strains from China 10 morphological characteristics were studied with the hierarchica cluster analysis and principal components analysis, and were compared with those of A.

对中国两性生殖卤虫12个品系的10个品系形态特征进行了聚类分析和主成分分析，并与 A.urmiana进行了比较研究。

To analyse chemical components of volatile oil from leaves of Artemisia Borealis.

对北极地区北极蒿挥发油的化学成分进行分析。

Components of Jerusalem artichoke which came from' different area were analyzed.

分析了来自不同地区的菊芋成分，干物质含量在23％～26％，菊粉多糖含量为17％～18％。

The main components of Jerusalem artichoke powder, more dietary fiber and sugar.

其主要成分为菊芋粉、膳食纤维和多糖类。

Factories, as the name suggests, exist merely to create other components and objects.

工厂，如名字所说的那样，是为了创建其他的组件和对象而存在的。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。