 |
| |||
| direct measurement | |||
| direct observation | |||
|
直接 观测 : 7 phrases in 4 subjects |
| Electronics | 2 |
| Metallurgy | 1 |
| Space | 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