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22有些小狡猾,看第二段第一句:
Walking on two legs in an upright posture (bipedal locomotion) is a less efficient proposition than walking on all fours (quadrupedal locomotion) because several muscle groups that the quadruped uses for propulsion must instead to provide the biped with stability and control.
文章中locomotion的方式就说了两种,一个是两足行走,一个是四足行走,由后文可知现代人和原始人都是两足行走的,所以这一点上,大家是一样的!当然也就最相似咯~ |
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