研究人员称，史前穴居人先将头骨清洗干净后，再用石器修正上半脑部位置的形状，使之成为容器。
Prehistoric cave denizens cleaned the skulls before using stone tools to shape the upper parts of the brain cases into containers, the researchers say.
除渍后之餐具，须用清水清洗或将其放入洗碗机清洗干净即可。
In addition to stains after the utensils, cleaning with water or place it in the dishwasher clean.
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