Scientists say the diet of prehistoric humans probably required more chewing teeth.

VOA: special.2011.08.10

So, they are,of course, sort of prehistoric monsters as far as the Greeks are concerned.

因此对希腊人而言,他们就是一群史前怪物

耶鲁公开课 - 古希腊历史简介课程节选

like prehistoric elephants and buffalo and things like that.

像史前大象，水牛和其他这类的动物。

自然历史博物馆 - SpeakingMax英语口语达人

Others are American blues. One,a kind of prehistoric love song, is in the style of the French romantic singer Maurice Chevalier.

VOA: standard.2009.11.25

This is an interesting quote about maize from this particular book called Prehistoric Food Production in North America and if you have trouble I'll read it.

这是一句关于玉米的有趣引用,来自于《史前北美食物生产》,如果你们看不请,就让我读一次吧

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Naturally it's called Four Corners. Nearby,you'll find the Painted Desert with sand of many colors, and the world's largest site of petrified prehistoric rock.

VOA: standard.2010.03.22