FDSR算法主要思想为，先在基因排列中找降序小队，在其末元素和逆相邻元素之间作相应的翻转操作。

The soul of FDSR Algorithm is finding the descending strip in permutation and then make a corresponding reversal operation between the last item and the con-adjacent one every time.

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铱：如果铱听起来让你觉得熟悉，那可能是因为很多通讯卫星都是以这种硬而脆的大密度金属元素命名的，也可能是因为恐龙在白垩纪末从地球灭绝，与铱有关的缘故。

Iridium (Ir): If iridium sounds familiar, that might be because there’s a group of communications satellites named after this element, a hard, brittle and dense metal.

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