bipedalism ['baɪpedlɪzəm]

例句:

• We think about the evolution of bipedalism as one of first events that led hominids down the path to being human.
  双腿直立行走的进化是原始人向人类进化的最初阶段中的一步.
  
• Bipedalism made the human form of birth possible.
  直立行走让人类的出现成为可能.
  
• I'd suggest the rut was lost to make bipedalism easier.
  来自SA
• But there was an even closer match between Lucy's proportions and a type of bipedalism shown by orangutans.
  来自BBC
• Bipedalism gave us an advantage over our ape cousins in terms of our capacity to wander.
  来自SA