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来源:雅诚德英语网
Further experiments carried out at Oxford suggest that crows can also use sticks as tools to inspect all sorts of objects, possibly to assess whether or not they present a danger.
在牛津大学进行的进一步实验表明,乌鸦也会用棍子作为工具来检查各种物体,可能是评估它们是否构成危险。