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| concentración f | |||
| koncentracja: 37 phrases in 15 subjects |
| Business | 2 |
| Commerce | 2 |
| Economy | 8 |
| Electrochemistry | 1 |
| Environment | 2 |
| Finances | 1 |
| Fish farming pisciculture | 4 |
| Law | 1 |
| Mathematics | 7 |
| Nuclear physics | 1 |
| Piezoelectric crystals | 1 |
| Politics | 1 |
| Radio | 3 |
| Semiconductors | 1 |
| Statistics | 2 |