Biorthogonality relation
[计] 双正交关系
🧩 词语组成解析
[计] 双正交
🗣️ 情景例句
Thanks, I hope we meet again soon.
谢谢，希望我们能很快再见面。
Think of the devil and he's looking over your shoulders.
说到曹操，曹操就到。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。