单词	parking orbit
释义	parking orbit noun : an orbit of a spacecraft from which the spacecraft or another vehicle may be launched on a new trajectory Word History First Known Use 1953, in the meaning defined above
随便看	smock smock frock smock mill smock windmill smock-face smocked smocking smockings smocks smog smoggier smoggiest smogginesses smoggy smogless smogs smokable smoke smoke and mirrors smoke ball smoke beetle smoke black smoke blue smoke bomb smoke brown

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