| |||
| 系统研究 | |||
|
system study : 31 phrases in 15 subjects |
| Agriculture | 1 |
| Automobiles | 1 |
| Aviation | 5 |
| Business | 2 |
| China | 1 |
| Communications | 1 |
| Cryosphere | 1 |
| Earth sciences | 3 |
| Electronics | 8 |
| Labor law | 1 |
| Management | 1 |
| Project management | 2 |
| Public security | 1 |
| Space | 2 |
| United Nations | 1 |