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| трудность; сложность | |||
| уровень трудности | |||
| степень трудности | |||
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难度 : 71 phrases in 11 subjects |
| Aviation | 2 |
| Business | 1 |
| Corporate governance | 1 |
| Education | 10 |
| Forestry | 1 |
| General | 47 |
| Oil / petroleum | 1 |
| Oil processing plants | 1 |
| Sports | 2 |
| Technology | 4 |
| Telecommunications | 1 |
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