Lagrange's identity
[计] 拉格朗日恒等式
🧩 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
What happened?
怎么样？
Self-trust is the first secret of success.
自信是成功的首要秘诀。
A week? As long as that?
一星期？要那么长时间？