 |
| |||
| spectrum | |||
|
谱， 范 围 : 16 phrases in 6 subjects |
| Automobiles | 1 |
| Electronics | 1 |
| Oil / petroleum | 2 |
| Remote sensing | 3 |
| Space | 1 |
| Technology | 8 |
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