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second order system; second-order system | |||
secondary power system | |||
secondary system |
二次 系统 : 45 phrases in 13 subjects |
Automobiles | 10 |
Ecology | 1 |
Electronics | 8 |
Engineering geology | 1 |
Hydroelectric power stations | 2 |
Metallurgy | 8 |
Nautical | 1 |
Refrigeration | 2 |
Space | 1 |
Technology | 8 |
Telecommunications | 1 |
United Nations | 1 |
Water resources | 1 |