他继续按照他的分类学，把鲸按大小分为三大类或三本书。
Continuing in his taxonomy, he groups whales into three major categories, or books, by size.
综述了近年来鲸类分子系统学的研究进展。
The progress of the study on molecular phylogeny of cetaceans was reviewed.
综述了近年来鲸类分子系统学的研究进展。
The progress of the study on molecular phylogeny of cetaceans was reviewed.
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