... phic alignment 地形排列线 topographic condition 地形条件 topographic contour 地形等高线 ...
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extreme topographic condition 恶劣的地形条件
topographic condition of the beach 岸滩地形
topographic and geologic condition 地形地质条件
·2,447,543篇论文数据，部分数据来源于NoteExpress
You need to be in reasonable condition and come equipped with the right shoes, gear and topographic maps or GPS. Trails can be narrow, steep and have icy patches, even in summer.
BBC: Getting fresh in Germany: Cycling, hiking and skiing
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