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- Strategic Earth Orbit System 战略地球轨道系统
- space-based infrared low earth orbit system (SBIRS-Low) 天基红外低轨卫星系统
- We sent an unmanned rocket into earth orbit. 我们把一个无人驾驶的火箭送入了地球的轨道里。
- One year is one Earth orbit around the Sun. 一年就是地球绕太阳一周的时间。
- Launch vehicle: Rocket system that boosts a spacecraft into Earth orbit or beyond Earth's gravitational pull. 运载火箭:将航天器推入绕地球轨道或脱离地球引力范围的火箭系统。
- The Soviet Union put the first satellite into Earth orbit. 苏联发射了第一颗人造卫星进入地球轨道。
- Vicarious Calibration of an Ocean Salinity Radiometer from Low Earth Orbit. 地球低轨道海洋盐分辐射表的替代校准。
- The first two Rangers, launched in 1961, never got out of earth orbit. 最初的两艘游骑兵太空船，在1961年发射，始终没有脱离地球轨道。
- The two satellites were placed respectively in LEO (low earth orbit) and geostationary transfer orbit. 两颗卫星分别进入近地轨道和地球同步转移轨道。
- The earth orbits the sun once every 365.25 days. 地球每365.;25天绕太阳轨道一圈。
- 1 Terabyte: Automated tape robot; all the X-ray films in a large technological hospital; 50,000 trees made into paper and printed; daily rate of EOS (Earth Orbiting System) data (1998 一个自动化卡带装置所需的空间大小；一所大型技术医院的所有X光片；用五万株树做成的纸张的打印品；环地轨道系统的日运行量（1998年）
- Periapsis in Earth orbit,the point in its orbit where a satellite is nearest to the Earth. 以地球为中心的最近点，人造卫星轨道上离地球中心最近的点。
- Within weeks, the Soviets launched another satellite into Earth orbit, Sputnik Two. 仅在几个星期内，苏联就发射了第二颗卫星??史泼尼克2号??进入地球轨道。
- Withthe enhancement of the space militarization, it is necessary to know the present low earth orbit satellites. 随着太空军事化趋势的日益增强,了解和认识当前的低轨道卫星较为必要。
- This paper presents a high-speed data transmission system based on DSP technology and PC104plus bus,which system is to evaluate the AOS(Advanced Orbit System)data transmission technical. 该文介绍了一种基于PC104Plus总线和DSP系统的高速数传系统,它是空间数据传输标准AOS(高级在轨系统)的仿真和验证系统。
- Orion will dock with the lunar module in Earth orbit, and the Earth departure stage will propel both to the moon. 猎户座"飞船将与低地球轨道上的登月舱对接，由地球出发站将两者送往月球。
- International Space Station in near Earth orbit, NASA astronauts carried out space walks and lost a bolt and a watcher. 在国际空间站接近地球轨道的地方;NASA的宇航员完成了太空行走;迷失了一个螺钉和一个观测仪.
- Together in Earth orbit, the spacefaring combination was momentarily the third brightest sky light in view. 与地球轨道同步，太空上的联合体暂时成为了天空中第三亮的天体。
- Atomic oxygen in a low earth orbit is very active in chemical reactions, and it can oxidate copper. 低地球轨道的原子氧化学性能非常活泼，能使金属铜氧化。
- The earth orbits the sun once every 3 6 5 . 2 5 days . 地球每365。25天绕太阳轨道一周。
