In order to explain observedAMR and its scatter, mechanisms of diffusion of stellar orbitsand non-instantaneous mixing must be considered in Galacticchemical evolution models.

• 为了解释观测的年龄--金属丰度关系及其弥散，银河系化学演化模型必须考虑恒星轨道运动、非瞬时混合等机制。