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| system optimization | |||
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| system optimization | |||
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系统 优化 : 60 phrases in 15 subjects |
| Air defense | 1 |
| Aviation | 4 |
| Business | 1 |
| Commerce | 1 |
| Earth sciences | 6 |
| Ecology | 1 |
| Electronics | 16 |
| Mechanics | 2 |
| Oil / petroleum | 1 |
| Space | 5 |
| Technology | 16 |
| Telecommunications | 2 |
| United Nations | 1 |
| Water resources | 1 |
| Wind Energy | 2 |
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