目前，在CAD系统中，一般采用特征表示和边界表示的混合表示方法，以充分利用两种表示法的优点。
At present, the CAD system always USES hybrid representations of feature representation and boundary representation in order to take advantages of both representations.
在细微边界元识别和细微特征分解交替进行的过程中，任意用边界表示法表示的几何模型可逐步简化到任意程度。
In the cycle of detailed boundary entities recognition and detail feature decomposition, an arbitrary solid model which is represented as B-Rep model can be simplified to any level.
介绍，半边网格结构是一个多能的边界表示法，在编写快速边界邻接查询和统一定位方面的工具非常有用。
The half-edge mesh structure is a manifold boundary representation, useful for writing tools that rely on quick adjacency queries and a uniform orientation.
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