bipedalism

基本解释

Bipedalism - walking on two feet - is one of the defining characteristics of being human, and scientists have debated for years how it came about.
用两条腿走路是人类的基本特征之一，多年来，科学家们在这一特征的形成问题上一直争论不休。
www.oxford.com.cn
That proved bipedalism did not evolve on the savannah, but since hair does not fossilise, it is hard to establish when the hominids began to lose it.
这证明，两足动物的演化史并不是在大草原上进行的。但是，由于毛发不会变成化石，因此很难确定原始人类在什么时候开始失去毛发。
It therefore sheds light on a longstanding debate: whether it was bipedalism or giving birth to babies with large heads that drove changes in the shape of the human pelvis.
这也使长期的争论变得清晰起来：是否这种物种是用两只脚行走，或是它所生的后代头比较大，使其骨盆发生了改变，和人类的骨盆形状一样。