The first satellites placed in geostationary orbit were the synchronous communication(SYNCOM)satellites launched by NASA in 1963.
第一个放在地静止轨道的星是1963年美国航空暨太空总署发射的同步星.
The first satellites placed in geostationary orbit were the synchronous communication(SYNCOM)satellites launched by NASA in 1963.
第一个放在地静止轨道的星是1963年美国航空暨太空总署发射的同步星.
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