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| underground train A train for transportation of people, mostly beneath the surface of the ground, in order to lessen the traffic (为减轻交通压力，主要在地面下运行的运送人员的列车。) | |||
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地铁列车 : 5 phrases in 3 subjects |
| General | 1 |
| Hydroelectric power stations | 1 |
| Technology | 3 |
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