我们可以用眼睛和面部表情来如实地传达情感上的每一丝细微差别。
We can use our eyes and facial expressions to communicate virtually every subtle nuance of emotion there is.
事实上，第四代比第三代过得稍微差一些。
Indeed, the fourth generation is marginally worse off than the third.
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。
These animals don't have a sophisticated brain to recognize the slight differences between human facial features.
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