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阶差 : 65 phrases in 16 subjects |
Air defense | 2 |
Aviation | 7 |
Business | 12 |
Cryptography | 2 |
Earth sciences | 2 |
Ecology | 1 |
Economy | 2 |
Electronics | 5 |
Metallurgy | 2 |
Nautical | 1 |
Nursing | 2 |
Oil / petroleum | 1 |
Space | 5 |
Surgery | 2 |
Technology | 18 |
Telecommunications | 1 |