Covariations
(covariation 的复数) [计] 协变性, 协方差
🗣️ 情景例句
Thank you, Grandpa.
谢谢你， 爷爷。
It is easy to be wise after the event.
当事后诸葛亮容易。
Yet their present development is wholly different,
但是，这两个地方目前的发展程度完全不一样。