Identity operator
单位算子
🧩 词语组成解析
identity
[ai'dentiti]
n. 身份;[逻]同一性;个性;[数]恒等（式）;
🗣️ 情景例句
Pull yourself together.
振作起来。
One good mother is worth a hundred schoolmasters.
一个好的母亲顶得上一百个教师。
We have this item in three price levels.
此一品目，我们分三种等级的价格。