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- The shape and perigee of artificial satellite orbits shall continually variate due to caused by the atmospherical drag and the earth gravity. 人造地球卫星的轨道由于大气阻力和地球引力场等因素的摄动,其形状和近地点位置将不断改变。
- The characteristics of the normal equation created in recovering the earth gravity model (EGM) by least-squares (LS) adjustment from the in-situ disturbing potential has been discussed in detail. 摘要讨论了在基于能量法确定地球重力场模型的过程中,利用最小二乘方法由沿轨扰动位数据解算位系数时法方程的特性,在该问题中,法方程只与卫星轨道有关。
- Should say this friend raised a moment ago the question a little question, is not around the extension, has own track, is the geostationary satellite, acts according to the earth gravity attraction. 应该说刚才这位朋友提的问题有点问题,不是绕着转,是有自己的轨道,都是同步卫星,是根据地球引力吸引的。
- The model of the Earth gravity field 地球重力场模型
- The force of gravity pulls things towards the earth's centre. 地心吸力把物体吸向地心。
- In this area, the development of early rockets is chronicled from the earliest conceptions of propulsion to the invention of liquid fuel rockets capable of escaping the Earths gravity. 这个展览区依次展示火箭早期发展的情况,概述火箭由最早的推进器发展至能够摆脱地心吸力的液体燃料火箭。
- The force of gravity makes things fall to earth. 地心引力使物体落向地面。
- Our pilotless rocket enters the track of the earth. 我们把一个无人驾驶的火箭送入了地球的轨道里。
- The attraction of the moon for the earth causes the tides. 月球对地球的吸引力造成潮汐。
- Relationship Between Earth Gravity Field and SST by Numerical Simulation 地球外部引力场引起卫星间距离变化的数值模拟研究
- On earth gravity model determination from GPS phase data onboard satellite 由星载GPS相位数据确定地球重力场模型若干问题研究
- The earth is only a speck in the universe. 地球在宇宙中只不过是一个小点罢了。
- The lunar gravity is about one-sixth that on earth. 月亮的引力大约为地球的六分之一。
- How on earth do they manage to rob the bank? 他们到底怎么抢了银行的?
- A number of satellites are now circling the earth. 一些人造卫星现在正环绕地球飞行。
- The machine cast up a big heap of earth. 机器卷起了一大堆泥土。
- The red sun lights up the sky and the earth. 红太阳照亮了天空和大地。
- Who on earth is that female he's with? 跟他在一起的那个女人究竟是谁?
- The earth is round because of gravity. 地球是由于重力而成为球形的。
- Antarctica is the loneliest place on earth. 南极是地球上最偏远的地区。