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.

· · 来源:study资讯

all branches had one. Long-distance computer communication links were very

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夏商周三代是青铜器登上历史主舞台的时代。张昌平对二里岗文化早期青铜器形态、组合与铸造工艺的分析,厘清了二里岗文化早期青铜器的阶段性特征。虽然这一时期青铜器生产的规模有限,但“以器载礼”的观念已经形成,这也是推动中原王朝崛起的重要因素。而将高超技艺、审美趣味与政治权力有机融合的礼仪制度,正是中华民族创造力的突出体现。

Cheyenne MacDonald for Engadget

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