In it will seemingly float, since gravity is 3 D.因为是3D的引力,在它看来将是似乎是飘浮的.Efficient index structure can improve the performance of 3 D model retrieval greatly.在3D模型检索领域中,高效的索引结构能提高检索效率.This article discusses VC ++ With 3 D ...

3D的音标：...

n.three dimensional，third的缩写，[医][=third-degree（erythemal）dose]三级红斑剂量num....