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.
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