The good news, Perera said, is that levels of PAHs are declining in New York City.
佩雷拉说好消息是纽约市的多环芳烃含量正在减少。
Perera says. 'The placenta is not the perfect barrier we once thought.
胎盘并不像我们曾经认为的那样是一个完美的屏障。
But when she analyzed her samples Perera discovered PAH attached to some of the DNA in blood taken from umbilical cords too.
但是分析了样本之后，佩雷拉发现多环芳烃也附着于脐带血中的一些DNA。
Furthermore, the foul air can literally stunt the growth of the next generation, according to recent research from Frederica P. Perera of Columbia University and her Chinese colleagues.
而哥伦比亚大学的弗雷德里卡·佩雷拉和她的中国同事的最新研究表明，污染的空气将会真正地阻碍下一代的生长发育。
Furthermore, the foul air can literally stunt the growth of the next generation, according to recent research from Frederica P. Perera of Columbia University and her Chinese colleagues.
而哥伦比亚大学的弗雷德里卡·佩雷拉和她的中国同事的最新研究表明，污染的空气将会真正地阻碍下一代的生长发育。
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