这名工作人员累积辐射剂量为0.5毫西弗，远低于法定上限。

The worker 's cumulative radiation exposure was 0.5 millisievert, far below the legal limit.

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这是一个巨大的剂量，因为我们每年从氡之类的天然源接收到的辐射平均只有2.4毫西弗茨。

That's a huge dose when you consider that each year we receive an average of 2.4 millisieverts from natural sources such as radon.

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国际原子能机构今日证实，核电站的辐射水平确有提高(“的确达到了每小时400毫西弗”)。

The International Atomic Energy Agency (IAEA) confirmed today that elevated radiation (" dose rates up to 400 millisieverts per hour ") had been reported at the plant.

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