"To us, the most likely explanation appears to be that the basis lies in their living with humans, which gives them a lot of exposure to human facial expressions," and this exposure has provided them with many chances to learn to distinguish between them, Muller said.
穆勒说：“对我们来说，最有可能的解释似乎是，这一现象的根源在于它们与人类生活在一起，这让它们接触了大量人类的面部表情。”而这种接触也为它们提供了很多机会来学习区分它们。
“We’ve always known Cambridge is not the center of the universe,” Mr. Muller said. “If you’re in Silicon Valley, you might make that mistake.”
Muller表示：“我们一直都清楚，剑桥不是宇宙的中心，可如果你身处硅谷，可能就会犯这样的错误。”
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