| |||
| twardy; stały; sztywny | |||
| French thesaurus | |||
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| en réclusion; être dans son, travailler avec énergie | |||
|
dur : 60 phrases in 20 subjects |
| Banking | 2 |
| Chemistry | 6 |
| Construction | 17 |
| Earth sciences | 3 |
| Economics | 2 |
| Electric traction | 1 |
| Electrochemistry | 1 |
| Electronics | 2 |
| Finances | 1 |
| General | 2 |
| Industry | 2 |
| Law | 1 |
| Life sciences | 5 |
| Lighting other than cinema | 1 |
| Magnetics | 1 |
| Mathematics | 1 |
| Metallurgy | 1 |
| Microsoft | 8 |
| Resins | 1 |
| Transport | 2 |