 |
| |||
| physical factor | |||
| natural agents | |||
| natural cause; natural factor | |||
| 自然因素: 8 phrases in 4 subjects |
| Desert science | 1 |
| Engineering geology | 1 |
| Project management | 1 |
| Technology | 5 |
|
| |||
| physical factor | |||
| natural agents | |||
| natural cause; natural factor | |||
| 自然因素: 8 phrases in 4 subjects |
| Desert science | 1 |
| Engineering geology | 1 |
| Project management | 1 |
| Technology | 5 |