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此文根据日本大阪大学微生物病研究所田口铁男教授1991年5月在济南召开的第二届全国肿瘤生物治疗学术会议上的演讲稿译出。
This article was translated from a speech given at the 2nd National Conference on Tumor Biotherapy held in Jinan in May 1991 at the Institute of Microbial Diseases, Osaka University, Japan.