 |
| |||
| 洪水季节; 洪水时期 | |||
| flood time: 11 phrases in 5 subjects |
| Bridge construction | 2 |
| Desert science | 1 |
| Economy | 2 |
| Hydroelectric power stations | 1 |
| Technology | 5 |
|
| |||
| 洪水季节; 洪水时期 | |||
| flood time: 11 phrases in 5 subjects |
| Bridge construction | 2 |
| Desert science | 1 |
| Economy | 2 |
| Hydroelectric power stations | 1 |
| Technology | 5 |