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| 71. | topographic grain |
| 地形起伏趋向 |
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| 72. | Palaeozoic relief |
| 古生代地形起伏 |
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| 73. | undulating land |
| 起伏的土地 |
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| 74. | 1/8 fluctuation |
| 1/8起伏 |
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| 75. | tracking jitter |
| 跟踪回波起伏 |
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| 76. | perturbation of velocity |
| 速度起伏变化 |
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| 77. | decay time of scintillation |
| 起伏衰落时间 |
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| 78. | mean squared fluctuation |
| 均方起伏 |
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| 79. | correction for relief |
| 地形起伏校正 |
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| 80. | rolling readjustment |
| 起伏式调整 |
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