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| nieobowiązkowo; fakultatywny opcjonalny; nieobowiązkowy; ponadprogramowy | |||
| opcjonalny (Pertaining to a component, parameter and so on that is not required or automatic) | |||
| English thesaurus | |||
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| opsh | |||
| opt. | |||
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| o/p | |||
| O | |||
| optional: 28 phrases in 11 subjects |
| Agriculture | 2 |
| Construction | 1 |
| Economy | 2 |
| Finances | 1 |
| General | 4 |
| Health care | 1 |
| Human rights activism | 10 |
| Microsoft | 4 |
| Obsolete / dated | 1 |
| Patents | 1 |
| Social science | 1 |