搜索结果: 1-1 共查到“人类学 animal”相关记录1条 . 查询时间(0.062 秒)
《The Descent of Man, and Selection in Relation to Sex》Chapter IX Secondary Sexual Characters in the Lower Classes of the Animal Kingdom
The Descent of Man, and Selection in Relation to Sex 人类由来与性选择 查尔斯·达尔文 Charles Darwin
2008/12/22
WITH animals belonging to the lower classes, the two sexes are not
rarely united in the same individual, and therefore secondary sexual
characters cannot be developed. In many cases where the sexe...