因为鸦科动物有其他的认知技能，研究人员想看看它们是否也有镜像自我识别的能力。
Because corvids have these other cognitive skills, researchers wanted to see if they were also capable of mirror self-recognition.
因为鸦科动物有其他的认知技能，研究人员想看看它们是否也有镜像自我识别的能力。
Because corvids have these other cognitive skills, researchers wanted to see if they were also capable of mirror self-recognition.
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