| 1. | Rockets and artificial satellites can go far above the ionosphere .
火箭和人造卫星能够到达电离层以上极远的地方。 |
| 2. | Many of the radio and electronic devices used are similar to those of artificial satellites .
所用的无线电和电子仪器中许多与人造卫星的相同。 |
| 3. | The rocket climbs upward and onward, with an artificial satellite cradled in its nose cone .
随带装在其前端锥形体内的一颗人造卫星，火箭一直向上，向前爬升。 |
| 4. | The precise tracking of artificial satellites has enabled this surface to be more accurately contoured .
人造卫星的精确探测有可能比较准确地画出这一表面的轮廓。 |
| 5. | Reaction power sends artificial satellites into orbit
反作用力把人造卫星送入轨道。 |
| 6. | The artificial satellite was launched into orbit
那枚人造卫星射入了轨道。 |
| 7. | The first artificial satellite was fired off on october 4 , 1957
第一颗人造卫星于1957年10月4日发射升空。 |
| 8. | Rockets and artificial satellites
火箭与人造卫星 |
| 9. | The orbit of the artificial satellite has an apogee of 200 miles from the earth
这个人造卫星的轨道,其最远点在离地球200英里的地方。 |
| 10. | Many of the radio and electronic devices used are similar to those of artificial satellites
所用的无线电和电子仪器中有许多与人造卫星的相同。 |
