这里用的是 平行光，模拟太阳光。
调试技巧：加打印语句观察每轮变化
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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.
· 赵敏 · 来源：best资讯