They were sent up with early space flights to see how human cells coped with zero gravity and exposed to radiation to test the effects of nuclear weapons.
这些细胞随着早期的航天飞行被送上太空，用以观察人类细胞在失重的状态下如何存活，并将它们暴露在辐射中用以测试核武器的影响。
Radiation levels have been monitored by the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), which operates 63 surveillance stations around the world.
全面核禁试条约组织(CTBTO)筹备委员会在世界各地设有63个监视站，正在对辐射水平进行监测。
Radiation levels are being monitored by the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), which operates 63 surveillance stations around the world.
全面核禁试条约组织(CTBTO)筹备委员会在世界各地设有63个监视站，正在对辐射水平进行监测。
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