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X 系统英国的一种数字交换系统 |
X System : 27 phrases in 14 subjects |
Agriculture | 2 |
Automobiles | 1 |
Business | 1 |
Earth sciences | 1 |
Electronics | 8 |
Geology | 1 |
Geophysics | 2 |
Information technology | 1 |
Oil / petroleum | 1 |
Rail transport | 2 |
Space | 2 |
Sports | 1 |
Technology | 2 |
Telecommunications | 2 |