被子植物雌、雄配子体的形成是世代交替的关键过程之一。

Angiosperm female and male gametophyte formation is the key to the process of generational one.

这两个纲的许多种类都有水母型和水螅型的世代交替。

The two key link in many types of jellyfish are generational-type and Hydra type.

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。

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

你见过有几个人能像邓这样，拥有法律赋予的绝对权力，而他的孩子却不能继承世代交替的控制权？

How many times have you seen anyone with such absolute power put into law that his children could not maintain a generational grip on power?