太空碎片包括失效卫星、数以千计的飞船碎片和航天员丢失的设备。

Space debris includes thousands of inactive satellites, fragments of broken up spacecraft and equipment lost by astronauts.

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太空里的通讯却伴随着特殊的电信号跳变，因此需要一个“储存和转送”系统以保证在通讯过程的每一步都不会有信息丢失。

Space communication happens in distinct jumps, and requires a “store and forward” system that can retain information at each step in the process.

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一旦你的工具在太空丢失了，你可以再打印一个。

So if you lose your tool in space, you can print out another one .

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