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。
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。
The division criteria is the formal logic of the roof, which is perfectly meaningless.
空间划分的标准与屋顶的形式逻辑一致，但屋顶的形式却是没有意义的。
The division criteria is the formal logic of the roof, which is perfectly meaningless.
空间划分的标准与屋顶的形式逻辑一致，但屋顶的形式却是没有意义的。
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