情况更为复杂的，是一个存在已久的问题：法令规定，一旦医疗与辐射从业员的累积剂量超过安全标准，便不允许他们继续从事相关工作。
Complicating the situation is an abiding problem: regulations forbid medical and radiation workers from continuing in their jobs if they have exceeded safe cumulative dosage levels.
情况更为复杂的，是一个存在已久的问题：法令规定，一旦医疗与辐射从业员的累积剂量超过安全标准，便不允许他们继续从事相关工作。
Complicating the situation is an abiding problem: regulations forbid medical and radiation workers from continuing in their jobs if they have exceeded safe cumulative dosage levels.
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