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互补测验(complementation test)(http://www.biox.cn/content/20050825/34870.htm)是遗传学的一个重要问题,初次接触这个概念,不易理解。我想到《管锥编》有“盲跛互助”故事,拿这个故事来比况互补测验情形,效果不错。
“智者《法华玄义》卷一上引《百论》:“若神无触,身不能到,如盲跛二人相假能到”;“智目行足”之语亦见卷二、卷四。希腊古诗屡咏一跛一盲,此负彼相,因难见巧,合缺成全(One man was maimed in his legs, while another has lost his eyesight. The blind man, taking the lame man on his shoulders, kept a straight course by listening to the other’s orders. It was bitter, all-daring necessity which taught them how, by dividing their imperfections between them, to make a perfect whole)。十八世纪法国诗人寓言中国瞽人与瘫痪人相约,秉孔子“人当互助”(Aidons-nous mutuellement)之遗训,“我以尔视,尔以我行”(Je marcherais pour vous, vous y verrez pour moi)”(钱锺书《管锥编》第二册)。
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