绘制卫星返回地球效果图与顶柱图，通过绘图，可以把复杂、抽象的问题变得简单、直观，为问题的求解与结果的分析提供了便利。(Drawing the satellite return to earth effect map and the top column diagram, drawing and drawing, it can make the complex and abstract problems simple and intuitive, and provide convenience f