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相 摆动 : 10 phrases in 9 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Electric machinery | 1 |
| General | 2 |
| Gymnastics | 1 |
| Information technology | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Surgery | 1 |
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