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| 距离一时间曲线 | |||
| 距离时间曲线 | |||
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distance-time curve : 12 phrases in 5 subjects |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 7 |
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