Comparison of age in log (yr) and metallicity ([M/H]) between the predicted values from our MMLforGalAM and true values: panel (a) shows the comparison for age and panel (b) shows the results of metallicity. In the bottom panels, Δlog Age represents the difference between the predicted and true values of age, while Δ[M/H] represents the difference of metallicity. Note: the points out of 3σ are clipped.