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Level 7

Permutations and combinations


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letter
n.字母
distinct
adj.不同的
arrange
vt.排列
permutation
n.排列
factorial
n.阶乘
identical
adj.完全相同的
remainder
n.余数
select
vt.挑选
choose
vt.选择
selection
n.选择,挑选
order
n.顺序
application
n.应用