When you get older, crows' feet often form around your eyes.

你年纪大的时候，鱼尾纹常常会在你的眼周显现。

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Now it’s this latter muscle that’s involuntary, so the crows feet smile is considered the real spontaneous emotion and is known now as the Duchenne smile.

现在发现眼轮匝肌的动作是无意识做出的，因此，带鱼尾纹的微笑被看成是情感的自然流露，誉为杜乡式微笑（发自内心的微笑）。

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The zygomatic major muscle that turns the corners of the lips up, and the orbicularis oculi muscle that squeezes the eyes into the famous fanned wrinkles also known as crows feet.

颧骨的主肌肉使嘴角上扬，眼轮匝肌挤压眼睛使其弯成非常令人满意的、像鸟足一样的扇形。

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