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| 公开/私有: | 公开 私有 |
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| 公开/私有: | 公开 私有 |
- 冻土区 (6)
- 公路路基 (3)
- 多年冻土 (3)
- 道路工程 (3)
- glaciers (2)
- ice (2)
- risk assessment (2)
- 研究 (2)
- climatic changes (1)
- cold regions (1)
- cryosphere (1)
- effect of global warming on (1)
- environmental aspects (1)
- extinction (biology) (1)
- frozen ground (1)
- history (1)
- ice sheets (1)
- land use (1)
- landscape architecture (1)
- landscape protection (1)
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