按照供体细胞的不同，哺乳动物核移植研究可分为两种：胚胎细胞核移植和体细胞核移植。

According to the different donor types, mammalian nuclear transfer can be divided into two kinds: embryonic nuclear transfer and somatic nuclear transfer.

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例如，一些物种可以被分为两种不同的种群，我们发现百分之七十以上的灵长类动物以及啮齿类动物具有阑尾。

For example, when species are divided into groups called 'families', we find that more than 70 percent of all primate and rodent groups contain species with an appendix.

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