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逻辑习题: The Science of Programming, David Gries 第二章习题七答案有一句话看不懂

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逻辑习题: The Science of Programming, David Gries 第二章习题七答案有一句话看不懂

习题七问题截图
习题七解答截图(中间红线标红的那句看不明白)

请问:原书解答中 This adds m propositions {E}i at the main level.到底啥意思?(见附件中划红线那句)

  1. 这使得主层增加了m个{E}i.(按我理解,应该是一次操作增加了k个啊.)
  2. 这使得主层由m个g组成的{E}i的个数增加了.(难道是这个意思?)

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与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
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