This paper introduces the method of using a small triangle which is similar to the vision-vanishing point triangle to solve the problem, so that making perspective drawing more rapidly and precisely.
采用一个与视灭三角形相似的小三角形作为绘图辅助，同时结合量点法中的分量点概念进行作图，就可以很好地解决这个难题，而且能更加快速准确地绘制两点透视图。
Besides, from the perspective of the economic link embodied by taxation, currently, West Triangle, as an economic entity, is difficult to be formed.
此外，从税收体现的经济联系看，目前“西三角”作为经济实体还难以形成。
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