Interplanetaryspacecraft 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。
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Modern solar sail spacecraft designs, like NanoSail-D or the Japanese interplanetaryspacecraft IKAROS, rely on the small but continuous pressure from sunlight itself for thrust.