 |
| envelhecimento: 86 phrases in 22 subjects |
| Agriculture | 7 |
| Chemistry | 2 |
| Communications | 2 |
| Demography | 3 |
| Economy | 2 |
| Electronics | 3 |
| Environment | 4 |
| Food industry | 1 |
| General | 19 |
| Health care | 3 |
| Industry | 2 |
| Labor law | 2 |
| Materials science | 4 |
| Mechanic engineering | 1 |
| Metallurgy | 16 |
| Natural sciences | 3 |
| Piezoelectric crystals | 1 |
| Research and development | 1 |
| Social science | 4 |
| Statistics | 1 |
| Technology | 4 |
| Transport | 1 |