平均变差

variation of rate variation of the rate mean variation variation in rate mean variation in rates variation of black level variation of tolerance coefficient of cyclic variation variation of a measure variation of field intensity variation of vertical mean variation of daily rate mean variation of rates rate-of-feef variation spectrum-rate of variation relation luminosity rate of variation relation mean annual rate of interest mean deviation of daily rate mean annual rate of increase mean rate of circumferential fiber shortening between-the-mean variation mean interdiurnal variation