1. 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。
2. 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。
3. It is a really cool derivation. 这是真实的冷驱动。
4. It's about a five, six minutes derivation. 现在推导大致需要约五六分钟。
5. So I won't write out the whole derivation of it. 所以我不会写出所有推导过程。