 |
| time of: 61 phrases in 18 subjects |
| Business | 1 |
| Economy | 15 |
| Electric motors | 1 |
| Electricity generation | 2 |
| Electronics | 8 |
| Environment | 1 |
| International Monetary Fund | 14 |
| Mathematics | 1 |
| Oil / petroleum | 2 |
| Physics | 2 |
| Piezoelectric crystals | 1 |
| Power lines | 1 |
| Power system protection | 6 |
| Statistics | 1 |
| Thermal Energy | 1 |
| Transport | 2 |
| Vacuum tubes | 1 |
| Water resources | 1 |