 |
| 全封闭的: 12 phrases in 8 subjects |
| Automobiles | 1 |
| Bridge construction | 1 |
| Chemistry | 1 |
| Electronics | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 1 |
| Refrigeration | 1 |
| Technology | 3 |
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