习题链接：LeetCode 1475. 商品折扣后的最终价格
2026年主流生成式AI工具与创收路径分析
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The NHS is already under huge pressure this winter, with rising flu cases and other winter infections doing the rounds.
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.
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