Read Edit View history 协方差 xiéfāngchā covariance Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 协方差/協方差 · xiéfāngchā · covariance 2026/03/04 协方差 / 協方差 xiéfāngchā covariance (statistics) covariance 这两个随机变量之间的协方差为零，说明它们不相关。 created sense Mar 4, 2026, 02:25 AM