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使用试验 : 72 phrases in 15 subjects |
Air defense | 1 |
Automobiles | 13 |
Aviation | 7 |
Business | 4 |
Drilling | 1 |
Earth sciences | 2 |
Economy | 1 |
Electric machinery | 2 |
Electronics | 4 |
General | 2 |
Oil / petroleum | 1 |
Plastics | 4 |
Space | 11 |
Technology | 18 |
Telecommunications | 1 |