Interplanetary spacecraft may require more radiation shielding than the low-orbit and lunar craft that humans have travelled in so far.
行星际飞船也许需要比迄今人类已经乘坐过的低轨道和月球登陆舱更强的辐射防护。
A neutron detector aboard the lunar orbiter found a decrease in neutron radiation that could represent either water or hydrogen in certain areas.
搭载在月球探测器上的中子探测器就发现在特定的地区中子的辐射量减少，而这也许表明月表上可能会有液态水或氢气的存在。
And they need to understand how to shield living Spaces from the deadly radiation that eternally pounds the lunar surface.
他们还要搞清楚如何使得居住空间能够抵御永远冲向月球表面的致命辐射。
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