Most drawings consist of two-dimensional (2D) views of objects that are three dimensional (3D). Though this method of drafting is widely used in the architectural and engineering communities, it is limited: the drawings are 2D representations of 3D objects and must be visually interpreted. Moreover, because the views are created independently, there are more possibilities for error and ambiguity. As a result, you may want to create true 3D models instead of 2D representations. You can use the AutoCAD drawing tools to create detailed, realistic 3D objects and manipulate them in various ways.
大部分图形都是由三维 (3D) 对象的二维 (2D) 视图组成的。尽管此种绘图方法广泛用于建筑和工程领域，但它也受到限制：图形是三维对象的二维表示形式，并且必须进行可视解释。而且，由于视图是独立绘制的，因此很有可能出现错误或表达不清楚。结果，用户可能会希望创建真正的三维模型，而不仅仅是二维表示。使用 AutoCAD 的绘图工具可以创建详尽、真实的三维对象，并且能够以多种方式对其进行处理。
