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> 热门题目 > A traditional method of threshing is to make donkeys or oxen pull a stone roller and walk in circles on the grain on a hard surface.

A traditional method of threshing is to make donkeys or oxen pull a stone roller and walk in circles on the grain on a hard surface.

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题目：A traditional method of threshing is to make donkeys or oxen pull a stone roller and walk in circles on the grain on a hard surface.

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