太空环境下的宇宙射线辐射强度，超过地球上人体承受极限的十倍以上。
Background cosmic radiation levels in free space are ten times greater than the maximum acceptable levels for individuals who work in radiation environments on Earth.
首先，太空飞行器执行任务时会经历复杂的空间环境，包括温度数百度的巨变，很强的电磁干扰和宇宙高能粒子辐射等。
Firstly, spacecraft carries its mission in very severe environment, including varied temperature ranging hundreds centigrade, electromagnetic interference, high-energy cosmic radiation particles etc.
引发单粒子翻转的空间高能带电粒子环境包括银河宇宙线，太阳宇宙线和地球辐射带中的高能质子及重离子。
The space energetic particle environment inducing SEU includes galactic cosmic ray, solar cosmic ray and high-energy trapped protons and heavy ions.
不过，为时最长的阿波罗任务不过12天，标本又保存在阿波罗宇宙飞船舱内，因此并非完全处于宇宙辐射的环境之下。
The longest Apollo mission, though, lasted no more than 12 days, and samples were kept within the Apollo spacecraft and thus not exposed to the full space-radiation environment.
不过，为时最长的阿波罗任务不过12天，标本又保存在阿波罗宇宙飞船舱内，因此并非完全处于宇宙辐射的环境之下。
The longest Apollo mission, though, lasted no more than 12 days, and samples were kept within the Apollo spacecraft and thus not exposed to the full space-radiation environment.
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