纯种的

Autopolyploidy A type of polyploidy involving the multiplication of chromo-some sets from only one species.

通常是由同一个体，同一染色体数目加倍而成多倍性现象。

The dog is a real thoroughbred.

这条狗是真狗。

With more than 1.6 million registered pedigree cows, Germany is the home of biggest herdbook population all over the world.

德国拥有超过160万头奶牛，是世界上最大奶牛群之。