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
Did everything go all right?
一切都顺利吧？
How much is it by registered mail?
挂号信要多少钱？
John seldom gets together with his friends.
约翰很少与朋友聚在一起。