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。

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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。

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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。

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But Mendis finished with 4-46 and Thisara Perera 3-36 as the tourists were 251 all out in 49 overs.

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Maharoof (18), Bandara (16) and Ruchira Perera (0) all followed within two overs as Pakistan wrapped up a convincing victory.

BBC: SPORT | Cricket | Pakistan complete series victory

He stayed to carve Thissara Perera over the off-side for two boundaries, before being bowled round his legs by the same bowler.

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