利用前者填充边自相交的多边形区域需要做大量排序操作，这极大降低了填充效率；
But using the former to fill polygons with edge self-intersection needs large of taxes, affecting filling efficiency greatly.
有两种抽象层：硬件抽象层及平台抽象层，前者的必要性显而易见，而后者的目的是充分利用平台所提供的最佳特性。
There are two kinds of abstraction layers: a hardware one, and its necessity is obvious, then there is a platform abstraction layer to make use of the best features a platform provides.
但是德国市场和非洲市场有着天壤之别，前者成熟且具有高度竞争力，而后者尚在襁褓之中，沃尔玛可以利用自身的全球影响力随意地搓圆揉扁。
But there is a world of difference between the mature, highly competitive German market and using its global clout to shape an African market that is still in its infancy.
应用推荐