81. | The damaged plane spiraled to earth . |
| 受伤的飞机打着转坠到地上。
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82. | In its primeval state the earth was a fiery glowing ball. |
| 地球起初是一个燃烧着的火球。
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83. | Vapors steam upward from the earth . |
| 水汽从地面上升起。
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84. | Its roots are striking deep into the earth . |
| 它的根深深扎入土中。
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85. | The third crew was to survey earth resources with highly sensitive cameras. |
| 第三组人员将要用感沈度高的照相机测勘地球资源.
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86. | There have been many idle superstitions as to the influence of the moon upon the earth and its inhabitants. |
| 有许多有关月亮影响地球及地球上居民的毫无根据的迷信。
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87. | The sun lights and warms the earth . |
| 太阳照亮并温暖大地。
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88. | How many sate lilts have been put in orbit round the earth ? |
| 有多少个人造卫星已被送入绕地球的轨道。
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89. | Copernicus discovered an important truth when he learned that the earth moves round the sun. |
| 哥白尼认识到地球环绕太阳旋转时,他发现了一个了不起的真理。
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90. | The earth turns round the sun. |
| 地球绕着太阳转。
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