单词bipedalism
网络: 直立行走；二足性；双足直立行走
whether it was bipedalism or giving birth to babies with large heads that drove changes in the shape of the human pelvis.
他是否具有二足性或者是否在生下了大头的后代后盆骨才渐趋向人形的。
" The debate over the origins of human bipedalism has been argued since Charles Darwin"s day, dividing into two competing models.
围绕人类两足行走起源的争论从查尔斯·达尔文时代就开始了，分为相互不让的两种模式。
The genus homo evolved bipedalism and big brains, allowing its pushiest parvenu, h. sapiens, to crush competition ever since.
人属动物（genushomo）逐渐进化为直立行走，脑容量较大，从而使其最富进取心的“暴发户”——智人（h.sapiens）自此以后可以摧毁竞争对手。