 |
| |||
| improvement factor | |||
|
改善因 : 19 phrases in 6 subjects |
| Air defense | 8 |
| Aviation | 2 |
| Economy | 1 |
| Electronics | 3 |
| Space | 2 |
| 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