In his autobiography,Darwin himself speaks of his intellectual powers with extraordinary modesty. He points out that he always experienced much difficulty in expressing himself clearly and concisely, but (1)he believes that this very difficulty may hav
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【原题】：In his autobiography,Darwin himself speaks of his intellectual powers with extraordinary modesty. He points out that he always experienced much difficulty in expressing himself clearly and concisely, but (1)he believes that this very difficulty may hav
