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城市对
| 选择
| 城市对 | |
| avia. | city pair |
| 选择 | |
| gen. | alternative; opt |
| econ. | pick |
| hydroel.st. | selection |
| interntl.trade. | picking |
| manag. | choice activity |
| sport. | choose; choice; option |
| |||
| city pair | |||
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城市对 : 10 phrases in 4 subjects |
| Aviation | 2 |
| Earth sciences | 1 |
| General | 2 |
| Technology | 5 |
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