说明：  用鼠标左键控制立方体的旋转，右键单击移动立方体，压下滚轮实现放大缩小立方体。Using mouse left button directed the cube,right button translate cube, middle button zoom in or zoom out it.
(Cube with the left mouse button to control the rotation, right-click mobile cubes, screwdown Wheel Zoom realize cube. Using mouse left button directed the cube, right button translate cube, middle button zoom in or zoom out it.)