环绕: 86 phrases in 15 subjects |
Antennas and waveguides | 1 |
Cartography | 1 |
Construction | 1 |
Electronics | 7 |
General | 33 |
Geography | 1 |
Hi-Fi | 1 |
Information technology | 1 |
Law | 1 |
Mathematics | 1 |
Medical | 2 |
Physics | 1 |
Statistics | 1 |
Technology | 33 |
Telecommunications | 1 |