prehistoric [ˌpri:hɪˈstɔ:rɪk]

例句:

• An archaeologist inspecting a shard at some prehistoric ruin.
  来自P. Auster
• The display of prehistoric monsters is comically naive.
  史前怪物的展览幼稚可笑。
  
• prehistoric hunters and gatherers
  史前的狩猎者和采集者
  
• Local folklore has it that prehistoric men drove cattle over these cliffs.
  当地民间传说中称,史前人类把野牛从这些悬崖上驱赶下去.
  
• The current epidemic of obesity also has prehistoric roots.
  来自WSJ
• So what did this prehistoric "Big Bird" eat?
  来自SA