 |
| |||
| negative input positive output | |||
| |||
| negative input, positive output | |||
|
负 输人 正输出 : 4 phrases in 2 subjects |
| Aviation | 1 |
| Electronics | 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