derivation
n. 起源,由来;派生,词源;求导,导数
复数 derivations
例句
The derivation of its name is obscure.
它名字的根源起源鲜为人知。
《柯林斯英汉双解大词典》
Sometimes if I'm in the middle of a sentence or the middle of a derivation, I may have to go over by a couple of minutes.
有时候如果我正在讲解一句话,或者正在推导一个公式,我会稍微多讲几分钟。
This is true as the above derivation for a and b of opposite parity is an if and only if statement.
这是正确的,因为上面对 a 和 b 的奇偶性的推导是一个当且仅当命题。