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对称 光 : 60 phrases in 11 subjects |
| Anatomy | 1 |
| Automobiles | 12 |
| Construction | 1 |
| Electronics | 14 |
| Hydroelectric power stations | 2 |
| Information technology | 1 |
| Nursing | 2 |
| Oil / petroleum | 1 |
| Power system protection | 4 |
| Technology | 20 |
| Telecommunications | 2 |
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