然而，由于核安全仍然是一个国家问题，这项行动计划并不是强制性的。
However, the action plan was not obligatory as nuclear safety remained a national issue.
这是由于亚特兰提斯核毁灭的悲惨命运而发生的。
This occurred due to the sad fate of a nuclear annihilation over Atlantis.
这是由于亚特兰提斯核毁灭的悲惨命运而发生的。
This occurred due to the sad fate of a nuclear annihilation over Atlantis.
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