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SCIENCE STUDY

What are people’s eyebrows saying?

作者:teen
Aa
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我们的眉毛有什么用?

Straight or arched (弯的), thick or thin –eyebrows come in many shapes and sizes. But what are eyebrows even for? They don’t keep us warm like our hair, or help us breathe like our nose. So why do we have them at all?
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