Identity matrix
[计] 单位矩阵, 恒等矩阵
🧩 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
As a matter of fact,
事实上，
Better than nothing.
有总比没有好。
Jim, how long have you been at this school?
吉姆，你到这学校有多么时间了？