This becomes more obvious in winter as skin becomes more transparent due to lack of sun and tanning. In the summer dark circles are easier to hide as people suffer less from fatigue and the skin is lightly tanned. Additionally, during the summer, we experience higher serotonin levels, which raises our mood, when the skin is exposed to sunlight.

在冬天黑眼圈会更明显，因为冬季缺少阳光日晒会使皮肤更加透明。而在夏季，因为疲劳感减轻和皮肤晒黑，黑眼圈就比较容易遮掩。另外在夏季，皮肤暴露在阳光下，所以我们身体内的血清素含量会比较高，会帮我们提高情绪。

The study, carried out during clinical trials at AMA Laboratories in New York, found 82 per cent suffered from dark circles and puffy eyes in the winter as opposed to just 38 per cent in the summer. The study was carried out among women aged 27 and 60 and the results were consistent across the board. Researchers found women regain their youthful good looks in the summer once the cold, dark nights have eased.

该研究在纽约的美国医学协会实验室进行临床试验，发现在冬季82%的女性遭受黑眼圈和眼袋的折磨，而在夏季只有38%的受影响人群。参与研究的女性年龄区间从27到60岁，研究的结果也比较全面一致。一旦寒冷漆黑的冬夜过去，女性又会恢复青春靓丽美貌。在冬季82%的女性遭受黑眼圈和眼袋的折磨，而在夏季只有38%的受影响人群。参与研究的女性年龄区间从27到60岁，研究的结果也比较全面一致。一旦寒冷漆黑的冬夜过去，女性又会恢复青春靓丽美貌。

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