逆序数为奇数的排列称为奇排列。经过一次对换，奇排列变成偶排列，偶排列变成奇排列。在全部n级排列中，奇、偶排列的个数相等，各有（n！/2 ）个。任意一个n级排列与排列 12...n 都可以经过一系列对换互变，并且所作对换的个数与这个排列有相同的奇偶性。
事实上，它工作原理与巴贝奇的差分机相似，不同之处在于它的数字排列在圆柱形的外表面上而不是向织布机架那样水平分布。
In fact, it works much like Babbage's Difference engine, except that its digits are arrayed along the outer surface of a cylinder instead of horizontally along a loom-like rack.
勒亚力河从卡拉奇港北部流过，有大片呈现巨大的绿色几何形的盐田，排列在三角洲的北岸。
The Lyari River passes north of the Port of Karachi, and expansive salt works, appearing as large geometric areas of green, line the northern edge of that river’s delta.
按照佛罗伦萨美第奇宫的原则，房屋排列与面积和高度之类的尺度之间有直接的关联。
Following the principle of the Medici palace in Florence, there is a direct correlation between the rank of the premises and their physical parameters, such as area and height.
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