Characterized by reproduction involving the alternation of sexual and parthenogenetic generations.
世代交替的以涉及双性与单性生殖交替进行为特征的
Hofmeister, Wilhelm friedrich benedict(1824-77) German botanist who first demonstrated the alternation of generations in lower plants.
霍夫美施塔：是德国植物学家，第一个发现低等植物中具有世代交替的现象。
alternation of generations
【生物】世代交替 [更迭]
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
Alternation of sexual and parthenogenic generations, as in some aphids.
世代交替双性与单性生殖交替进行，如一些蚜虫中
solutions, such as switches, that replace PBXes;
替代用户交换机的解决方案，如交换器；
the turn of the year/century ;the time when a new year/century starts
年度[世纪]的新旧交替时期;一年之始;世纪之初.
A substitution, an exchange, or an interchange.
交换代替、交换或互换
The Realization of Expectation Damages:A Study of Substitute Transaction
期望损害赔偿的实现:替代交易的研究
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。
The Alternating Group Explicit Iterative Method for the Partial Differential Equation;
偏微分方程的交替分组显式迭代方法
Study of the Generalized Law of Alternating Polarity;
取代烷烃极性交替规律的ab initio研究
The 21 st Century--A New Era: Replace Modernization With Scientific-ization;
开创21世纪的新纪元:用科学化代替现代化
Its red refulgence spread out towards the vault of heaven, lifting the night sky higher and yet higher, and incarnadining it in turn. Below, though, was still a dark continent of limitless black.
这是晨光与黑夜交替的时刻，这是即将过去的世界与即将到来的世界交替的时刻。
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。
An Outline of CATV System Development in the Turn of the Century
世纪交替时期的有线电视体制发展格局
Such a switch replaces dedicated circuit-switching hardware with IP switching technology
这样的交换机是利用IP交换技术代替专用的电路交换硬件。
Computer Simulation of Gene Drift in Genetic Resources during the Generation Alternations
种质资源世代更替中基因漂变的计算机模拟
