earth orbit

基本解释

NASA is retiring the shuttles in order to focus on developing the next generation of spacecraft that could go beyond low-Earth-orbit.
航空航天侷正安排使所有航天飛機退役後，專注於發展第二代可飛越低地球軌道的飛機。
If all goes well, three “taikonauts” will embark Thursday on a three-day Earth-orbit mission, which includes the country’s first spacewalk.
如果一切順利，三名“太空人”將於周四開始一段爲期三天的太空之旅，其中一項任務是該國首次太空行走。
All but two of the plans call for commercial space companies to replace the Ares I rocket for low-Earth-orbit missions, and identify the Ares V as the corner stone of the NASA's future.
這兩個計劃幾乎都要求商業航天公司更換執行地球低軌道飛行任務的戰神1號（the Ares I）火箭，同時確定戰神5號火箭是美國宇航侷未來的中流砥柱。

In nineteen fifty-seven, a Soviet military rocket carried a small satellite into Earth orbit.
The number of man-made objects in Earth orbit has been growing each year.
It completes an orbit of the Earth in only ninety-seven minutes.

Others, including Pirate Party co-chairman Gregory Engels, seem to prefer the idea of a low-Earth-orbit satellite that would be harder to launch but easier to keep airborne than a slowly-deflating balloon.
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