| |||
| 开发工作; 开发活动 | |||
|
Development Activity : 19 phrases in 9 subjects |
| Air defense | 1 |
| Aviation | 5 |
| Desert science | 1 |
| Earth sciences | 1 |
| Economics | 3 |
| General | 2 |
| Name of organization | 4 |
| United Nations | 1 |
| United States | 1 |
| |||
| 开发工作; 开发活动 | |||
|
Development Activity : 19 phrases in 9 subjects |
| Air defense | 1 |
| Aviation | 5 |
| Desert science | 1 |
| Earth sciences | 1 |
| Economics | 3 |
| General | 2 |
| Name of organization | 4 |
| United Nations | 1 |
| United States | 1 |