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| 台 背: 34 phrases in 13 subjects |
| Air defense | 1 |
| Athletics | 1 |
| Aviation | 10 |
| Bridge construction | 2 |
| Desert science | 1 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 2 |
| Skydiving | 2 |
| Sports | 1 |
| Technology | 9 |
| Telecommunications | 1 |
| Tennis | 1 |
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