东北地区出土的旧石器时代人类化石、文化遗物和动物化石材料十分丰富。
The material of human fossil, culture relic and zoolite in the Old Stone Age, which are excavated in the Northeast of China, are very abundant.
对于这种饮食产生的原因是，旧石器时代人类通过自然选择已经适应了那个时代的食物。
The rationale for this is that natural selection has adapted Paleolithic humans to the food in that era.
北京人大约生活在公元前460,000年到230,000年之间，能够用活，并能制造石头工具，是早期旧石器时代人类的一个好实例。
Peking Man, who lived from about 460,000 BC to 230,000 BC and who was able to use fire and make stone tools, is a good example of early Old stone Age men.
逐渐适应的原则是基于人类心理学，自从15万年前的旧石器时代人开始在东非潜伏跟踪野生动物开始，这条原则已在大约一百万跑步者身上发生作用。
The gradual-adaptation principle is deeply rooted in human physiology, and has worked for about a billion runners since Paleolithic man started stalking wild animals in East Africa 150, 000 years ago.
逐渐适应的原则是基于人类心理学，自从15万年前的旧石器时代人开始在东非潜伏跟踪野生动物开始，这条原则已在大约一百万跑步者身上发生作用。
The gradual-adaptation principle is deeply rooted in human physiology, and has worked for about a billion runners since Paleolithic man started stalking wild animals in East Africa 150,000 years ago.
现代人继承得来的其它恐惧症，其形成时间可能远远晚于对蛇类和蜘蛛的恐惧；有可能在十万年前的旧石器时代晚期或更晚。
Other phobias that persist intomodern times may have been fixed much more recently than snakes and spiders, say in the late Paleolithic age, about 100, 000 years ago, or even morerecently.
部分古生物学者还是这样分析脑容量缩小的原因的，他们认为在旧石器时代中，古代人类可能需要在复杂的环境下生存，比如大量咬嚼大块食物（野兔、狐狸、马匹等）、从而直接锻炼了脸部、甚至脑部的发达，另外，脑容量越大、适应野外寒冷环境的能力更强。
Several theories have been advanced to explain the mystery of the shrinking brain. One is that big heads were necessary to survive Upper Paleolithic life, which involved cold, outdoor activities.
在这迷人的体积，中间方面中东的旧石器时代的考古学被带来到关于现代人的起源的当今的辩论。
In this fascinating volume, the Middle Paleolithic archaeology of the Middle East is brought to the current debate on the origins of modern humans.
尼安德塔人成功适应了旧石器时代的欧洲和西亚，他们显然是这个区域支配性的人类始祖，直到现代人类的出现。
Well-adapted to the cold climate of palaeolithic Europe and western Asia, neanderthals appear to have been the dominant hominid in the region until the emergence of anatomically modern humans.
尼安德塔人成功适应了旧石器时代的欧洲和西亚，他们显然是这个区域支配性的人类始祖，直到现代人类的出现。
Well-adapted to the cold climate of palaeolithic Europe and western Asia, neanderthals appear to have been the dominant hominid in the region until the emergence of anatomically modern humans.
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