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土 崩 : 31 phrases in 12 subjects |
Agriculture | 1 |
Bridge construction | 1 |
Desert science | 2 |
Ecology | 1 |
Engineering geology | 5 |
General | 1 |
Hydraulics | 1 |
Hydroelectric power stations | 3 |
Oil / petroleum | 1 |
Soil science | 1 |
Technology | 13 |
Water resources | 1 |