Substitution cipher
n.代用密码（或记号）
🧩 词语组成解析
substitution
[ˌsʌbsti'tju:ʃən]
n. 代替;代用;替换;<化>取代（作用）;
cipher
['saifə]
n. 密码;零;不重要的人;无价值的东西;
vt. 用密码书写;
🗣️ 情景例句
I would like to make an appointment for tomorrow morning please.
我想预约明天早上见面。
The poor are rich when they are satisfied.
贫能知足即为富。
or of the habits of the social insects, let us say.
和昆虫群居的习性