multiple permutationspermutation with repetitionrepeated permutation重复: repeat; duplicate; reduplica ...排列: arrange; rank; place; range; ...不重复排列: permutation without repetition无重复排列: permutation without repetition基因串联重复排列这些染色体上: s28s8s rrnana下载手机词典可随时随地查词查翻译