单词	launch a ship
释义	launch a ship 使船下水
随便看	variance from standard method variance function variance gamma pricing variance gradient variance heterogeneity variance homogeneous measurement variance in variance in calculation variance inflation factor variance in income variance in price variance in quantity variance instance id variance in temperature/pay variance law variance-length curve variance map variance matrix variance matrix of estimated error variance-maximizing rotation Variance mean variance-mean ratio variance measure variance method variance minimization model