 |
| 表土层: 81 phrases in 17 subjects |
| Agriculture | 7 |
| Architecture | 1 |
| Bridge construction | 5 |
| Construction | 1 |
| Desert science | 2 |
| Drilling | 4 |
| Earth sciences | 5 |
| Ecology | 8 |
| Engineering geology | 5 |
| General | 3 |
| Hydroelectric power stations | 3 |
| Hydrology | 1 |
| Metallurgy | 1 |
| Natural sciences | 1 |
| Oil / petroleum | 1 |
| Soil science | 1 |
| Technology | 32 |