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coulee; ravine; gully | |||
flume |
ravin : 43 phrases in 9 subjects |
Agriculture | 2 |
Amphibians and reptiles | 1 |
Construction | 6 |
Earth sciences | 9 |
Environment | 2 |
Hydrology | 4 |
Life sciences | 5 |
Natural resourses and wildlife conservation | 1 |
Soil science | 13 |