笑纹是皱纹的一种，一般分布在眼角和嘴角，由于笑的时候皱纹特别明显，所以被称之为笑纹。笑纹是皮肤受到外界环境影响，形成游离自由基，自由基破坏正常细胞膜组织内的胶原蛋白、活性物质，氧化细胞而形成的小细纹、皱纹。皱纹渐渐出现。
他有长长的笑纹，从他的眼角一直到他蓄着细长胡须的下颌。
He had long laughter lines that creased from the corners of his eyes all the way down to his narrow strip of beard.
我妈妈和我长得很像，除了她短短的头发和笑纹。
My mom looks like me, except with short hair and laugusth lines.
Notarbartolo微微地点头微笑，笑纹在他蓝色的眼睛周围荡漾开来。
Notarbartolo nods and smiles faintly, the laugh lines crinkling around his blue eyes.
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