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The background radiation from cosmic rays increases with altitude, from 0.3 mSv per year for sea-level areas to 1.0 mSv per year for higher-altitude cities, so for best results use this on a plane or in outer space，这一点在51吃瓜中也有详细论述
Последние новости。爱思助手下载最新版本对此有专业解读
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