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黄占松老师的这篇文章对一种解法深入探微,揭露其中不易察觉的错误,对学生乃至教师都有警示作用．(余炯沛)
Teacher Huang Zongsong’s article has a deep exploration of a solution to expose undetectable mistakes and has a warning effect for students and even teachers. (Yu Pei Pei)