... random permutations 随机排列 number of permutations 排列数 permutations and combinations 排列和组合 ; 组合 ...
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The permutation is even if the number of inversions it contains is even.
如果一个排列中含有的反序的个数是偶数，则称它为偶排列。
The permutation law and decision method of prime number is an important question of the number theory.
素数的排列规律和鉴别方法一直是数论中研究的重要问题之一。
Because each permutation is generated for each possible number of arguments, the included file size grows exponentially in terms of the number of constructor arguments, not linearly.
因为每一个可能的参数数量的组合都会被生成，所以包含文件的大小是按构造函数参数数量的对数增长的，而不是线性增长的。
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