Once the space-shuttle program ends this year, the only way to get people into orbit and to the International Space Station will be to buy seats on Russia's three-person Soyuz capsules.
美国航天飞机项目今年退役后，购买限乘3人的俄罗斯联盟号太空舱座位将是运送人员抵达国际空间站的唯一途径。
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