 |
| |||
| descent trajectory | |||
| 下 降弹道: 7 phrases in 3 subjects |
| Aviation | 2 |
| Biophysics | 1 |
| Space | 4 |
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