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If you refer to the generation gap, you are referring to a difference in attitude and behaviour between older people and younger people, which may cause them to argue or may prevent them from understanding each other fully. 代沟
Policy-makers note a "cultural generation gap, " and wonder whether "aging whites" will remain committed to paying taxes for the public schools as they fill with children of color, and whether a diverse and foreign-born generation of young adults will be eager to care for and fund programs for those aging whites.