permutationKK [ˏpɝmjuˋteʃən] /ˌpɝmjuˈteɪʃən/发音名词1排列、排列组合数学How many permutations of these five letters are possible?这五个字母共有多少种排列方式?2变化形式、组合方式The basic recipe has countless permutations across the region.这道基本食谱在当地有无数种变化形式。用这个字练口说→