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barrier : 66 phrases in 16 subjects |
Agriculture | 1 |
Commerce | 5 |
Construction | 18 |
Economy | 3 |
Environment | 7 |
Forestry | 1 |
General | 6 |
Immigration and citizenship | 2 |
International trade | 1 |
Law | 2 |
Mathematics | 2 |
Microsoft | 1 |
Natural sciences | 1 |
Politics | 12 |
Social science | 1 |
Transport | 3 |