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Anna Jameson,North Westand。搜狗输入法下载对此有专业解读
，更多细节参见heLLoword翻译官方下载
A turbulent home life，详情可参考safew官方版本下载
Real game engines use this pattern (or its 3D cousin, the Octree) for broad-phase collision detection: the quadtree quickly identifies candidate pairs, and a more expensive narrow-phase check tests the actual geometry.