双子座计划使宇航员了解了长期飞行中辐射的危害和失重的影响。

Gemini let astronauts learn about the dangers of radiation and the effects of being weightless during long flights.

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其中一些设备用来测试太空环境(如明显的失重)对人体的影响——其生物样本包括乘组人员。

Some of the equipment measures the effects of space conditions, such as apparent weightlessness, on biological specimens — including the crew.

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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。

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.

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