In micrographics, a measure of the remoteness of the copy from the original material, the first microfilm representation being the first generation microfilm.
在缩微照相技
,
量副本离原始资料远近的程
。第一次缩微
的胶片为第一代缩微胶片。
In micrographics, a measure of the remoteness of the copy from the original material, the first microfilm representation being the first generation microfilm.
在缩微照相技
,
量副本离原始资料远近的程
。第一次缩微
的胶片为第一代缩微胶片。
Compared with virginoparae, the genetic relationship between fundatrix and the first generation of virginoparae (apterous) produced by fundatrix (apterous) was much close.
③干母和干雌的遗

很近,但孤雌蚜已与二者有分化.
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