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| 41. | Next year it says it will launch its third manned spaceship into orbit around Earth. |
| 据称，中国明年还将发射第三艘绕地载人飞船。 |
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| 42. | Extending beyond the moon or the moon's orbit around Earth. |
| 越过月球外侧的在月球以外的或超过月球围绕地球轨道的 |
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| 43. | Such a station is also able to play a unique role in interrogating earth satellites in orbit over both |
| 同时，这个观测站还在监视两极轨道上的地球卫星方面发挥不可替代的作用。 |
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| 44. | Sputnik was the first man-made satellite to orbit the earth. |
| 人造卫星是第一个围绕地球旋转的人造物体。 |
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| 45. | to describe a craft that would orbit the Earth and return astronauts home. |
| 这艘飞船将绕地球 轨道飞行并将宇航员送回地球。 |
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| 46. | The moon at all times lies somewhere on that small ellipse which moves along with the earth in its orbit |
| 月亮永远处于这个小小的椭圆上，而这个椭圆随地球的轨道运动而移动。 |
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| 47. | In satellite communications, the point at which the satellite is at a minimum distance from earth in |
| 在卫星通信技术中,卫星在其轨道上离地球距离最近的位置。 |
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| 48. | The curvature of spacetime keeps the earth in its orbit around the sun and drives distant galaxies ever |
| 时空曲率使地球得以保持在绕日轨道中，也驱使遥远的星系彼此更加分离。 |
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| 49. | HubBle Space Telescope (HST): Most sophisticated optical observatory ever placed into orbit around Earth |
| 哈伯太空望远镜:置于地球轨道上最精密的光学天文台。 |
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| 50. | "The spacecraft goes into an orbit around Earth or, if given enough velocity, it continues toward another |
| 航天器进入围绕地球的轨道,如果给予足够的速度,它会继续朝着太空的另一个目的地前进。 |
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