Identity function
[计] 恒等函数, \是\函数
🧩 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
Are you ready to order now, sir?
先生，你准备点菜吗？
He measures another's corn by his own bushel.
用自己的标准衡量别人；以己度人。
Good morning.
早上好。