当原子不稳定时，会具有放射性。
在未作防护参与早期的原子试验后，许多军人患了放射病。
Many soldiers suffered radiation sickness after being present without protection at the early atomic tests.
在未作防护参与早期的原子试验后，许多军人患了放射病。
Many soldiers suffered radiation sickness after being present without protection at the early atomic tests.
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