如题所述
Feasibility Study of the Dry Hydraulic System in the Subway.
地铁内采用干式消火栓系统的可行性研究。
The Effect of Fissure under Ground Water on the Subway of Xi'an.
水环境下地裂缝对西安地铁的影响。
I happened to meet an old friend on the subway.
我在地铁里碰巧遇见了一位老朋友。