troço : 47 phrases in 17 subjects |
Agriculture | 3 |
Antennas and waveguides | 3 |
Brazil | 2 |
Chemistry | 2 |
Communications | 5 |
Economy | 1 |
Electricity generation | 1 |
Electronics | 1 |
Environment | 3 |
General | 1 |
Information technology | 1 |
Mathematics | 3 |
Microsoft | 1 |
Power lines | 1 |
Rail transport | 1 |
Scientific | 1 |
Transport | 17 |