The first satellites placed in geostationary orbit were the synchronous communication(SYNCOM)satellites launched by NASA in 1963.
第一个放置在对地静止轨道的卫星是1963年美国
太总
的同步传输卫星.
The first satellites placed in geostationary orbit were the synchronous communication(SYNCOM)satellites launched by NASA in 1963.
第一个放置在对地静止轨道的卫星是1963年美国太总的同步传输卫星.
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