Permutation index
[计] 排列索引
🧩 词语组成解析
permutation
[ˌpə:mju(:)'teiʃən]
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;
index
['ɪndɛks]
n. 索引;<数>指数;指示;标志;
vt. 给…编索引;把…编入索引;[经济学]按生活指数调整（工资、价格等）;
vi. [机械学]转位;
in(in)+dex(proclaim)→指针；索引；指数；食指；指标
🗣️ 情景例句
Where are you going during Summer vacation?
暑假你打算去哪儿？
The houses downtown are very expensive.
市区的房子很贵。
Then he put a piece of cheese in his pocket and went away.
然后把一块乳酪装进衣袋里走了。