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trace : 45 phrases in 15 subjects |
Agriculture | 1 |
Chemistry | 2 |
Construction | 1 |
Cultural studies | 1 |
Economy | 1 |
Electronics | 5 |
Environment | 4 |
General | 3 |
Human rights activism | 1 |
Information technology | 3 |
Life sciences | 1 |
Mechanic engineering | 1 |
Medical | 1 |
Pharmacy and pharmacology | 1 |
Transport | 19 |