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Gas Hydrate
1
Layered Fracture
1
Outburst
1
Soil
1
boeden
1
earth (soil)
1
earth (soils)
1
humus
1
mold
1
mould
1
muck
1
organic matter (soil)
1
organic matter in soil
1
permafrost
1
soil classification
1
soil mechanics
1
soil organic matter
1
soil types
1
soils
1
soils--organic matter
sols
1
terres
1
vegetable
1
vegetable mold
1
土壤
1
土壤有机质
1
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