They forgot how to make bone tools, catch fish and sew skins into clothes.
忘记了如何用骨头制作工具、抓鱼以及把兽皮缝制成衣服。
In 1999, the earliest man-made tools so far were found in Fanchang in central China's Anhui Province. More than 170 stone tools were unearthed here with a number of bone tools.
1999年，中国考古学家在安徽繁昌发现了世界上最古老的石器，计170余件，同时出土了少量的骨器。
They found that these bone tools cut the carcass effectively.
他们发现这些骨质工具切割兽肉是挺好用的。
They found that these bone tools cut the carcass effectively .
他们发现这些骨质工具切割兽肉是挺好用的。
They found that these bone tools cut the carcass effectively .
他们发现这些骨质工具切割兽肉是挺好用的。
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