If birds make their pupils large and small from time to time, this can be a sign that they are excited or scared or angry.
如果鸟类的瞳孔时不时地变大变小,这可能是它们兴奋、害怕或生气的迹象。
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The Fusion camera System has two cameras, but by using small high-definition digital image sensors, the lenses can sit closer together than your pupils.