 |
| |||
| 向N 定向播送M (N) | |||
| beam-to: 34 phrases in 8 subjects |
| Air defense | 3 |
| Bridge construction | 3 |
| Electronics | 2 |
| Engineering geology | 3 |
| Gymnastics | 2 |
| Oil / petroleum | 2 |
| Optics branch of physics | 1 |
| Technology | 18 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips