欧洲关于实验动物数量的法规可以回顾到1986年,很久以后,研究才开始培育第一代携带其他物种基因的动物。
The European directive on how such animals should be treated dates from 1986, long before research led to the breeding of the first creatures that carried the genes of another species.
欧洲关于实验动物数量的法规可以回顾到1986年,很久以后,研究才开始培育第一代携带其他物种基因的动物。
The European directive on how such animals should be treated dates from 1986, long before research led to the breeding of the first creatures that carried the genes of another species.
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