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The classical proposition logic is the basis of modern formal logic.
经典命题逻辑是现代形式逻辑的基础。
youdao
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The study of this formal logic undoubtedly has its USES.
对这种形式逻辑的研究，无疑是有用的。
youdao
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The study of this formal logic undoubtedly has its USES.
对这种形式逻辑的研究，无疑是有用的。
youdao