| |||
| 频率扫描 | |||
|
frequency-scan : 27 phrases in 7 subjects |
| Air defense | 9 |
| Electronics | 4 |
| Information technology | 1 |
| Multimedia | 1 |
| Oil / petroleum | 1 |
| Space | 6 |
| Technology | 5 |
| |||
| 频率扫描 | |||
|
frequency-scan : 27 phrases in 7 subjects |
| Air defense | 9 |
| Electronics | 4 |
| Information technology | 1 |
| Multimedia | 1 |
| Oil / petroleum | 1 |
| Space | 6 |
| Technology | 5 |