此外，还分析了重演只能是“简单而迅速”的原因，并定义了一个表征个体发育时间与系统发育时间换算关系的时间当量。
Besides, we analyse the reason that the recapitulation can only be simple and rapid, and a time equivalent of conversion relation between the time of ontogeny and phylogeny is also defined.
植物生物学主要介绍植物的生长与发育、结构与功能，以及植物个体发育和系统发育的过程等基本知识。
The plant biology mainly introduces the basic knowledge of the growth and development, structure and function etc of the plant, and the process of the plant individual growth and system development.
植物生物学主要介绍植物的生长与发育、结构与功能，以及植物个体发育和系统发育的过程等基本知识。
The plant biology mainly introduces the basic knowledge of the growth and development, structure and function etc of the plant, and the process of the plant individual growth and system development.
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