first-generation

Compared with virginoparae, the genetic relationship between fundatrix and the first generation of virginoparae (apterous) produced by fundatrix (apterous) was much close.

③干母和干的遗传关系很,但已与二者有分化.

In micrographics, a measure of the remoteness of the copy from the original material, the first microfilm representation being the first generation microfilm.

在缩微照技术中，度量副本离原始资的程度。第一次缩微后的胶片为第一代缩微胶片。