在1887年，国会设计了公共运输服务的线路，铁道部门必须对任何货物提供合理定价。

In 1887 Congress designated rail a common-carrier service. Railways had to offer reasonable rates and conditions on any cargo.

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它的目的不是要替换现有的货运服务，但应该使NASA建立一个理解的充分完全的能力以及建议的乘员运输系统的定价。

It is not intended to be areplacement for existing cargo services, but should allow NASA to establish anunderstanding of the full capacity and pricing of the proposed crewtransportation system.

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