"That is a clear difference between dogs and wolves, " says Marc Bekoff, a cognitive ethologist at the University of Colorado, Boulder.
博尔德市科罗拉多大学的认知动物行为学家马克?贝科夫认为“这是狗和狼的明显区别。”
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"It's very important" to do studies like these "on socialized wolves, " adds Adam Miklosi, a cognitive ethologist at E?tv?s Loránd University in Budapest.