Returns the population covariance of x-y pairs of values evaluated over a set, by using the biased population formula (dividing by the number of x-y pairs).是什么意思_Returns the population covariance of x-y pairs of values evaluated over a set, by using the biased population formula (dividing by the number of x-y pairs).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句