Radon is a common radioactive element in air, which is strongly harmful to the man's health. Man inhales radon and its daughters mainly from the indoor air.
氡是空气中常见的放射性元素，其对人体健康有强的危害作用，人体主要从室内空气中吸入氡及其子体。
Scientists are seeking ways to protect man from the effects of radioactive fallout.
科学家正在寻找保护人类不受辐射事故影响的方法。
Scientists are seeking ways to protect man from the effects of radioactive fallout.
科学家正在寻找保护人类不受辐射事故影响的方法。
应用推荐