... ref．reference 参考文献 rem roentgen equivalent man人体伦琴当量，雷姆 rep roentgen equivalent physical物理伦琴当量 ...
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If an astronaut had been on the Moon at the time, they might have received a 400 rem (Roentgen Equivalent Man) radiation dose.
BBC: NEWS | Science/Nature | Spacecraft go to film Sun in 3D
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