平面

Planar motion also requires that axes of all prismatic pairs and all revolute axes be normal to the plane motion.

平面运动需要所有的棱形副的轴和转动副的轴都垂直于运动平面。

When the system starts displaying machining animation, it does not need to calculate small triangular facets normal to the workpiece surface. It only needs to find out what part of the cutter cuts the workpiece surface and to read the normal from the file.

当显示加工动画时不必再计算毛坯表面小平面的法向量，仅仅需要计算是刀具的哪部分切削了该小平面，然后从文件中读出对应的法向量。

For easy to install and checkout optical instrument,here primarily introduces the basic principles and structure component of collimator,which is composed of object lens、divisional board and ground glass.

1引言根据几何光学原理，无限远处的物体经过透镜后将成像在焦平面上；反之，从透镜焦平面上发出的光线经透镜后将成为一束平行光。

Based on image we study the tool path generation technology and problem of tool path planning. We put forward an algorithm for self-discrimination of island relation and an automatic intersected method of the region machining unit, which can judge the relationship among any plane obturate contour line effectively and swiftly. We also study the tool path generation technology of two-dimensional machining, basso-relievo machining, three-dimensional lifting-pen machining. Meanwhile, we put forward an optimize approach of tool path, which improve the efficiency of engraving.

研究了图像的刀具路径生成技术与轨迹规划问题，提出了基于射线的岛屿关系自动判断和区域加工单元的自动分割方法，有效、快速地判断了平面任意封闭轮廓线之间的关系，研究了平面任意区域填充加工、浮雕加工、三维提笔加工的刀具路径生成的技术，提出了刀具路径优化方法，提高了雕刻加工的质量和效率。

We put forward an algorithm for self - discrimination of island relation and an automatic intersected method of the region machining unit , which can judge the relationship among any plane obturate contour line effectively and swiftly . we also study the tool path generation technology of two - dimensional machining , basso - relievo machining , three - dimensional lifting - pen machining . meanwhile , we put forward an optimize approach of tool path , which improve the efficiency of engraving

研究了图像的刀具路径生成技术与轨迹规划问题，提出了基于射线的岛屿关系自动判断和区域加工单元的自动分割方法，有效、快速地判断了平面任意封闭轮廓线之间的关系，研究了平面任意区域填充加工、浮雕加工、三维提笔加工的刀具路径生成的技术，提出了刀具路径优化方法，提高了雕刻加工的质量和效率。

These surfaces are so called "offscreen surfaces" and could be used for sprites or icons.

函数创建，这个平面同样称为"离屏平面"，同样可为精灵或图标使用。

The characteristics of the waves guided along a plane interface which separates a semi-infinite region of free space from that of a magnetoionic medium are investigated for the case in which the static magnetic field is oriented perpendicular to the plane interface.

沿平面界面分开的磁离子中，一个半区的空间是无限的，其中静态磁场导向的垂直平面接口个案调查指导波的特点。

Next, of fashionable network media there are two the largest interests in forming: The brand of planar and fashionable media that the first force is a tradition digitlizes value of transition, patulous brand and consequence to realize media, builds network vogue media, representative website includes Trends- style net of Chinese of international of Mi Na of osmund net of Xin of annals of woman of China of net of net, Vogue China, Yoka, ELLE, OnlyLady-, Ixinwei-, Mina-, Rayli- luck beautiful female net, these websites rely on the advantage such as the brand of the planar media with powerful oneself, content, channel, held the acme on character.

其次，时尚网络媒体的构成中有两股最大的势力：第一股势力是传统的平面时尚媒体品牌为实现媒体数字化转型、扩展品牌价值与影响力，所建立的网络时尚媒体，代表性的网站包括Trends-时尚网、Vogue中国、Yoka网、ELLE中国、OnlyLady-女人志、Ixinwei-昕薇网、Mina-米娜国际中文网、Rayli-瑞丽女性网等，这些网站依托自身强大的平面媒体的品牌、内容、渠道等优势，占据了品质上的顶点。

Popular in the Han, Song, Ming and Qing dynasties they were used to illustrate the ancient art of Peking Opera and Chinese folk tales and provided entertainment for young and old, and rich and poor alike. Traditionally made of parchment and stained or painted bright colours the puppets are illuminated by light, casting a shadow onto a screen of mulberry paper or white cloth.

皮影戏是让观众通过白色布幕，观看一种平面偶人表演的灯影来达到艺术效果的戏剧形式；而皮影戏中的平面偶人以及场面道具景物，通常是民间艺人用手工，刀雕彩绘而成的皮制品，故称之为皮影。

A integrated equation set for solving plane parallel motion of rigid body was derived, and the conditions of system of forces simplified on the center of mass plane was discussed.

给出了解决刚体平面平行运动问题的一组完整方程，讨论了力系简化在质心平面内的条件。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。