下笔三忌——教研论文写作漫谈之三安徽师范大学胡炳生因为长期担任中学数学教学杂志的编委，所以有机会经常审阅中学数学教师的来稿．在审稿时，常常为一些写作认真、字迹工整、插图有致，但却无法采用的教研文稿而感到可惜．为此我曾写过一篇文章，谈对落选稿件的思考．... Three Mistakes in Writing--Fundamental Discussion on Teaching and Research Paper Writing Hu Bingsheng of Anhui Normal University has long been a member of the editorial board of the middle school mathematics teaching magazine, so he has the opportunity to frequently review the contributions of middle school mathematics teachers. When reviewing the manuscript, he often felt sorry for some teaching and research contributions that were written seriously, neatly written, and illustrated, but that could not be adopted. To this end, I wrote an article about the thinking of the unsuccessful manuscript. ...