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31. | Many countries have sent up man made satellites to go around the earth. |
| 许多国家已发射了人造卫星环绕地球运行。 |
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32. | the first fourth of the moon's period of revolution around the Earth. |
| 月球围绕地球运转的第一个周期。 |
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33. | The moon orbits around the Earth; The planets are orbiting the sun. |
| 月亮绕地球转;行星正绕太阳转。 |
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34. | Long, long ago people thought that the sun went around the earth. |
| 很久以前,人们以为太阳绕着地球转。 |
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35. | Around the earth the young looked to him increasingly as their leader. |
| 世界各地的青年日益把他看作自己的领袖。 |
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36. | The satellite itself will orbit around the earth for a period of days. |
| 卫星本身将绕地球轨道运行一段时间。 |
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37. | If there were no gravity, there would be no air around the earth. |
| 假如没有重力,地球周围就没有空气。 |
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38. | because he declared that the sun does not revolve around the earth. |
| 就是因为他声称太阳不是绕地球旋转 |
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39. | the last fourth of the moon's period of revolution around the Earth. |
| 月球围绕地球运转的末一个周期。 |
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40. | In the absence of gravity, there would be no air around the earth. |
| 没有重力,地球周围就没有空气。 |
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