这表明,人类产生所依赖的大脑神经上的变化,有可能在大脑变大之前就已经出现,这也是迄今为止被认为是人类诞生的关键因素。
The hands, feet and pelvis of sediba indicate that it both climbed trees and walked upright,though with a different gait from that of humans or chimpanzees.
从源泉种的手、脚和骨盆来看,源泉种既能爬树又能直立行走,但步态与人类或是猩猩有点不一样。
The species may have been a toolmaker, as its hand allowed for a human-like grip.
这种物种有可能也会制作工具,因为它的手可以像人类一样抓取东西。
Sediba s pelvis, an upright butterfly shape, is likewise reminiscent of the human one.
源泉种的骨盆,呈垂直蝴蝶形,同样让人看到人类骨盘的影子。
It therefore sheds light on a longstanding debate:
这也使长期的争论变得清晰起来:
whether it was bipedalism or giving birth to babies with large heads that drove changes in theshape of the human pelvis.
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。
Adult sediba had small heads, which indicates that walking upright was the advantagebrought by the modern pelvis.
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