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说明：   根据运动合成原理建立了轻质杆在斜抛(包括竖直上抛)运动中质心和端点的运动方程，用动画演示了质心的斜抛运动和两个端点的运动轨迹，并显示了杆在一定时刻的位置。(Established in accordance with the composite theory of the movement in oblique light pole throw (cast on the vertical) movement of the centroid and the equation of motion of the endpoint, animation demonstrates the trajectory of the centroid of Projectile Motion and the two endpoints, and shows the lever in a certainthe location of the moment.)