Necessity and Contingency in fact some are for a reason.
必然性和偶然性的产生其实都是有原因的。
Necessity and contingency are a pair of very important categories in philosophy and logics.
必然性和偶然性是哲学和逻辑学中一对重要的范畴。
Necessity and contingency are a pair of very important categories in philosophy and logics.
必然性和偶然性是哲学和逻辑学中一对重要的范畴。
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