permutation
音标:[ˌpɜ:mjuˈteɪʃn]
n.(一组事物可能的一种)序列,排列,排列中的任一组数字或文字;
◆记忆方法一:
词根词缀记忆法:permutation n 改变;互换(permute+ation),mut= change,表示“改变”
N-COUNT. 排列. A permutation is one of the ways in which a number of things can be ordered or arranged.
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