This measure is called the number of inversions in the sequence.
这种计算方法称为序列的逆序数。
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。
Disintegration was reported as the number of inversions required to cause the granules to disappear.
据报道解体的数量反演事业所需的颗粒消失。
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