在绕轨道飞行时，她在太空中进行了我们国家的首次授课。这是中国航行史上的一个突破。
While orbiting, she delivered our country's first?ever video lecturein space, which was a breakthrough in China space history.
最后结果在佛罗里达州宣布，日期是第一次航天飞机飞行30周年以及苏联宇航员尤里·加加林成为绕地球轨道飞行第一人50周年纪念日。
The announcement in Florida came on the 30th anniversary of the first space shuttle flight and on the 50th anniversary of Soviet cosmonaut Yuri Gagarin becoming the first human to orbit the earth.
(美国)宇航局称，NASA的一个航天器开始绕水星轨道航行，成为第一个环绕太阳系最内侧行星飞行的航天器。
A NASA spacecraft began orbiting Mercury, becoming the first to fly around the solar system's innermost planet, the space agency said.
(美国)宇航局称，NASA的一个航天器开始绕水星轨道航行，成为第一个环绕太阳系最内侧行星飞行的航天器。
NASA spacecraft began orbiting Mercury, becoming the first to fly around the solar system's innermost planet, the space agency said.
神七在343公里高空的轨道绕地球飞行。
Shenzhou Seven will orbit the Earth at an altitude of 343 kilometers.
换句话说，在逃走到它在2002年被捕获的日心的轨道之前，这个物体很可能在这个时期绕地球飞行。
In other words, this object was very likely orbiting the Earth during this period before escaping into the heliocentric orbit from which it was captured in 2002.
友谊7号航天飞船进行轨道飞行，成为第一个绕地球轨道飞行的美国人。他先后于974年、980年和98'年当选为俄亥俄州的参议员。
Friendship 7, he became the first American to orbit the earth. He was elected U. S. senator from Ohio in 974, 980, and 98 '.
卫星在它的固定轨道里绕地球飞行。
这种方法可直接获得向径、轨道速度等参数随时间或极角（绕地心的转动角）的变化，便于分析轨道转移与逃逸运动，有助于飞行使命与运动轨迹的设计。
Radius and orbital velocities can be directly expressed as functions of time or polar angle, which is helpful for designing flight mission and motion trajectory.
其次，针对编队飞行卫星队形保持控制，以对地等张角绕飞编队为背景设计相对轨道模型预测控制算法。
Secondly, a model predictive control method is designed for the satellite formation keeping and formation of invariant angular to the ground as the background.
其次，针对编队飞行卫星队形保持控制，以对地等张角绕飞编队为背景设计相对轨道模型预测控制算法。
Secondly, a model predictive control method is designed for the satellite formation keeping and formation of invariant angular to the ground as the background.
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