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| Chinese | English |
| 地下铁路 | underground railway An electric passenger railway operated in underground tunnels (在地下隧道运行的电动客运铁路。) |
| 地铁列车 | 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。) |