planned orbit 中文意思是什麼
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The first mission to orbit saturn, planned since the early 1980 ' s, is a partnership of the national aeronautics and space administration, the european space agency and the italian space agency
美國宇航局、歐洲航天局、義大利航天局從上個世紀80年代就聯合展開了進入土星軌道的計劃。 -
The american space probe, mariner 9, has become the first spacecraft to orbit another planet, swinging into its planned trajectory around mars without a hitch
1971年的今天，美國宇宙飛船水手九號順利進入火星的計劃軌道飛行，成為首架環繞另一顆行星飛行的宇宙飛船。
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