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1·The gamete - producing phase in a plant characterized by alternation of generations.

配子体植物中以世代交替为特征的产生配子产生的阶段…

2·No alternation of generations the medusoid phase being entirely suppressed: sea anemones; corals.

由于没有世代交替，水母阶段遭到完全抑制；海葵；珊瑚虫。

3·Coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes.

以世代交替为特色的腔肠动物；通常群居的水螅阶段先于水母阶段；水螅和水母。