优化：如果某轮没有发生交换，说明已有序，提前结束
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A new study shows that exposure to two specific 'forever chemicals' may accelerate biological aging, especially in middle-aged men. Researchers revealed a link between faster epigenetic aging, and two of these alternatives, PFNA and PFOSA, a precursor of PFOA.
· 郭瑞 · 来源：dev资讯