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Earth Orbit Ejection 地球轨道发射
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。
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。
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。
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。
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。
In the free fall of Earth orbit, liquids and gases would stay in the pipes and stagnate. 在宇宙空间，宇航员的健康是至关重要的问题.;像管道工一样，附近几乎没有医生。
NASA should stop travelling to the International Space Station in particular and to “low Earth orbit” in general. 国家宇航局尤其要停止飞往国际太空站，一般的“近地轨道”飞行也要停止。
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。
Key words: CO2, Earth orbital parameters, LGM, China climate. 关键词：双多普勒雷达，飑线，三维风场，强对流带。