Prehistoric people in southern Africa developed a highly skilled way of shaping stones into sharp-edged tools long before Europeans did, suggested a study released recently.
最近发布的一项研究报告表明，居住在非洲南部的史前人类发明了远胜过欧洲旧石器时代的高超削石方法，此方法可把石头刮削成锋利的器具。
Prehistoric people in southern Africa developed a highly skilled way of shaping stones into sharp-edged tools long before Europeans did, suggested a study released recently.
最近发布的一项研究报告表明，居住在非洲南部的史前人类发明了远胜过欧洲旧石器时代的高超削石方法，此方法可把石头刮削成锋利的器具。
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