单系

The historical development of the concepts of genealogy, phylogeny, monophyly and polyphyly is briefly reviewed.

历史地回顾了谱、育、单、多概念的由来和展。

The results indicate that when the plastic strain is smaller than 39 5%,plastic deformation has typicality of uniserial slipping.

单晶连铸铝线材在变量小于395％时，其塑性变具有明显的单滑移特征，当变量大于395％时，才出现多滑移特征。