These animals don't have a sophisticated brain to recognize the slight differences between human facial features.

这些动物没有复杂的大脑来识别人类面部特征之间的细微差别。

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We'd assumed we'd have to give it a moving head and tail, facial features, and put a scene on it to make it smell like a real rat, but that wasn't necessary.

我们认为我们必须给它一个移动的头和尾巴，面部特征，并给它一个场景，使它闻起来像一只真正的老鼠，但这是不必要的。

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They suggest this indicates that dogs aren't sensing emotions from a single feature, but piecing together information from all facial features just as humans do.

他们表示，这一点表明狗不是从某个单一的特征来感知情绪，而是像人类一样，将所有面部特征信息整合到一起。

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The other thing we know about the brain is that the cortex is absolutely essential for is interpreting the features such as that facial expression, color.

我们还知道,大脑皮层对于解释面部表情,颜色等特征发挥绝对根本的作用。

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