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彩色编码 : 52 phrases in 12 subjects |
Advertising | 1 |
Agriculture | 2 |
Aviation | 1 |
Cartography | 1 |
Communications | 1 |
Electronics | 2 |
General | 3 |
Information technology | 2 |
Oil / petroleum | 1 |
Space | 7 |
Technology | 29 |
Telecommunications | 2 |