| 1. | For satellites circling the earth, the law of areas is also imperfect .
对于环绕地球运动的卫星来说，面积定律也是不完善的。 |
| 2. | It is in this sense that an astronaut orbiting the earth in a space capsule is said to be "weightless" .
就在这种意义上，宇宙飞行员在宇宙密闭小舱里，环绕地球飞行时被说成是“失重”了。 |
| 3. | Satellites orbiting round the earth have provided scientists with a vast amount of information about conditions in outer space .
环绕地球运行的人造卫星，为科学家提供了有关外层空间的大量资料。 |
| 4. | Satellites orbiting round the earth have provided scientists with a vast amount of information about conditions in outer space .
环绕地球运行的人造卫星为科学家们提供了大量有关外层空间情况的资料。 |
| 5. | A body subjected to gravitational attraction by the earth and orbiting the latter according to the law of celestial mechanics must be termed a "celestial body" .
一个受到地球引力吸引，并按照天体力学定律环绕地球运转的物体必须叫做“天体”。 |
| 6. | The equator is an imaginary circle around the earth
赤道即假想的环绕地球的大圆。 |
| 7. | Light can travel 7 . 5 times around the earth s equator
地球光每秒钟可以环绕地球赤道 |
| 8. | Circling the earth in a roughly north - south orbit
以南北方向环绕地球运行 |
| 9. | The gaseous envelope surrounding the earth
环绕地球的气层。 |
| 10. | It ' s likely to continue that way
船只将环绕地球而行。 |
