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| envejecimiento: 99 phrases in 18 subjects |
| Agriculture | 5 |
| Chemistry | 1 |
| Communications | 2 |
| Demography | 3 |
| Economy | 3 |
| Electronics | 7 |
| Environment | 1 |
| Food industry | 1 |
| General | 8 |
| Health care | 7 |
| Industry | 13 |
| Labor law | 2 |
| Materials science | 6 |
| Metallurgy | 23 |
| Social science | 5 |
| Statistics | 1 |
| Technology | 8 |
| Transport | 3 |
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