... 水彩背景图片 Watercolor background image ... 抽象绘画图片 Abstract drawing on 江南水乡春天水墨图片 Jiangnan Spring Photo Ink...
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A triangle is a basic drawing operation on which you can build more abstract operations.
三角形是基本的绘图操作，在此基础上可建立更为抽象的操作。
Abstract: This paper expounds in detail the structure, installation, function and parameter of ABS on large and middle-sized passenger car, the principle drawing of ABS circuit is also given.
文摘：详细叙述了大中型客车防抱死制动系统各部分的组成、安装、功能和参数，并给出了防抱死制动系统的电路原理图。
Traditional Drawing Geometry teaching depends on compass, ruler and slide show etc. Learner finds it abstract.
传统的《画法几何》教学方法凭借的是圆规、尺子和幻灯等教具，抽象、枯燥是学习者的共同感受。
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