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今年2月21日是张忠胤先生逝世十周年的日子,我们特发表他的学生、多年来一直在他身边工作的张杰坤同志的这篇短文,以资纪念。
February 21 this year marks the tenth anniversary of the death of Mr. Zhang Zhongyin. We have published this essay for his student, Comrade Zhang Jiekun, who has been working with him for many years.