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空 指令 : 72 phrases in 17 subjects |
Air defense | 4 |
Automobiles | 2 |
Aviation | 31 |
Business | 1 |
Computers | 1 |
Construction | 1 |
Electronics | 6 |
General | 2 |
Information technology | 5 |
International trade | 1 |
Mathematics | 1 |
Multimedia | 1 |
Securities | 2 |
Space | 3 |
Technology | 8 |
Telecommunications | 2 |
United Nations | 1 |