subway是可数名词;
subway复数形式:subways;n.地下铁道;地铁交通;(穿越马路等的)地下人行道
Application of the Shaft Connection Survey in Construction of Subways
竖井联系测量在地铁建设中的应用
The main fire facilities and fire problems of the subways of our country
我国地铁的主要消防设施和消防问题
Application of shallow underground excavation method and shield driving method for urban subways
浅埋暗挖法和盾构法在城市地铁中的应用