Permutations
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( permutation的复数形式 )
🗣️ 情景例句
I like to study in the library because it's so quiet.
我喜欢在图书馆学习因为那儿很安静。
It's a matter of life and death.
事关生死。
I've never met him but I've talked to him on the net.
我没见过他，但我和他在网上聊过天。