 |
| |||
| 研究工作活动 | |||
| 研究活动; 科学研究工作 | |||
| research activity: 13 phrases in 10 subjects |
| Air defense | 1 |
| Aviation | 2 |
| Business | 1 |
| Commerce | 1 |
| Earth sciences | 1 |
| Economy | 2 |
| General | 2 |
| Management | 1 |
| Technology | 1 |
| United States | 1 |
|
| |||
| 研究工作活动 | |||
| 研究活动; 科学研究工作 | |||
| research activity: 13 phrases in 10 subjects |
| Air defense | 1 |
| Aviation | 2 |
| Business | 1 |
| Commerce | 1 |
| Earth sciences | 1 |
| Economy | 2 |
| General | 2 |
| Management | 1 |
| Technology | 1 |
| United States | 1 |