... Basic Structure of Objects_物体的基础结构 Drawing Straight Lines_画直线 Drawing Lines Freehand_随手画线 ...
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You use it for drawing straight lines.
你用它来画直线。
VC NET development of CAD source, including drawing straight lines, arcs, and polygons, graphics printing.
用VC NET实现的CAD开发源程序， 包括画直线，圆弧，多边形，图形打印等。
Six identical triangles can be formed by drawing two straight lines through an octagon's center point.
经过八角形的中心画两条直线，能够得到六个一样的三角形。
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