从几何上看，函数可以用这个图像表示，固定某个点。
So, geometrically, my function can be represented by this graph, and I fix some point,.
结果证明：基于图元表示法对常见手绘几何图形识别速度快、准确率高；
The results prove that:our system has a high speed and accuracy.
结果证明：基于图元表示法对常见手绘几何图形识别速度快、准确率高；
The results prove that:our system has a high speed and accuracy.
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