Commutativity
[计] 可交换性
🗣️ 情景例句
I'm not only willing to help, I'm willing and able.
我不但示意帮忙，而且能够帮上忙。
Sober up!
清醒点！
No human endeavor or thought would be unchanged by it.
任何人类的努力和想法都会发生变化。”