Under international treaties, the U.S. is responsible for the cargo of both public and private spacecraft.

根据国际条约，美国负责公共和私人航天器的货运。

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He is responsible for the cargo of both public and private spacecraft.

他负责公共和私人宇宙飞船的货物运输。

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Plans are in the works for private companies to begin shipping cargo to the station, followed by the ability to carry astronauts.

正在计划的是让私人公司来开始运送货物到国际空间站，随后是运送宇航员的能力。

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For NASA, Mr. Musk's partner, the goal is to validate development of private cargo vehicles and eventually, fleets of space taxis to take astronauts into orbit.

WSJ: SpaceX's Pioneering Flight Plans

SpaceX is not the only firm in the private-cargo business.

ECONOMIST: SpaceX goes to the ISS

Plans are in the works for private companies to begin shipping cargo to the station, and eventually to carry astronauts as well.

CNN: Russia postpones new manned space station mission