这些洞穴绘画是世纪之发现。

The cave paintings are the finds of the century.

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这个数据可以回溯到对洞穴绘画的研究，人们观察猎人们用哪只手拿武器，以及考古学上对文物的分析。

And this goes back to studies of cave paintings, looking at which hands hunters are using to hold their spears, and to archaeological analyses of ancient artifacts.

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举例来说，在早先的法国洞穴绘画里，早于公元前10,000年的绘画中没有人与人打仗的画面。

For example, among ancient French cave drawings earlier than 10,000 B.C., there were no pictures describing people fighting with each other.

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