 |
| |||
| balloon observation | |||
| 气球 观测: 24 phrases in 10 subjects |
| Earth sciences | 8 |
| Ecology | 2 |
| General | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 4 |
| United Nations | 2 |
| United States | 1 |
| Wind Energy | 1 |
|
| |||
| balloon observation | |||
| 气球 观测: 24 phrases in 10 subjects |
| Earth sciences | 8 |
| Ecology | 2 |
| General | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 4 |
| United Nations | 2 |
| United States | 1 |
| Wind Energy | 1 |