alternation of generations
柯林斯词典
1. N the production within the life cycle of an organism of alternating asexual and sexual reproductive forms. It occurs in many plants and lower animals 世代交替; 有机生物生命周期中繁殖时无性繁殖和有性繁殖模式的交替 (Also called metagenesis, heterogenesis, digenesis, xenogenesis)
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