"史前人类"是个多义词，它可以指史前人类（人类祖先）,史前人类（中华书局出版图书）。
... 我们最早的祖先/our earliest ancestors 史前人类/prehistoric man 象形文字/hieroglyphics ...
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除此之外，史前人类使用的技术看起来比较简陋。
Beside this, prehistoric man looks technologically primitive.
史前人类从未向雷克斯暴龙扔过长矛，但确实猎杀过猛犸象和乳齿象。
Prehistoric humans never threw spears at Tyrannosaurus rex but really did hunt mammoths and mastodons.
当史前人类来到一处新地方时，一些奇怪的事情发生在大型动物身上，那就是它们突然灭绝了。
When prehistoric man arrived in new parts of the world, something strange happened to the large animals: they suddenly became extinct.
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