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21. | rugged countryside. |
| 多丘陵的乡村。 |
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22. | hillock moraine |
| 冰碛丘陵 |
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23. | Snow mantled the hills. |
| 雪覆盖着丘陵。 |
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24. | a rolling downy landscape |
| 丘陵连绵起伏的景色 |
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25. | low-lying hills |
| 低矮的丘陵 |
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26. | Monteregian Hills |
| 蒙特里根丘陵 |
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27. | Wanzhong Qiuling |
| 皖中丘陵 |
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28. | Edong Dishan Qiuling |
| 鄂东低山丘陵 |
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29. | karst hills-depression |
| 岩溶丘陵-洼地 |
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30. | A Mathematical Simulation of DEM Terrain Representation Error ——A Case Study in the Loess Hill gully |
| 数字高程模型地形描述误差的量化模拟——以黄土丘陵沟壑区的实验为例 |
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