透 水 层 : 159 phrases in 15 subjects |
Agriculture | 2 |
Architecture | 4 |
Bridge construction | 20 |
Desert science | 9 |
Earth sciences | 2 |
Ecology | 2 |
Electronics | 3 |
Engineering geology | 24 |
Geology | 1 |
Hydroelectric power stations | 16 |
Metallurgy | 1 |
Oil / petroleum | 1 |
Rail transport | 1 |
Space | 1 |
Technology | 72 |