subway是可数名词。复数形式是subways。
subway：n.地下铁道；地铁交通；(穿越马路等的)地下人行道
相关介绍
'I could take the subway and have David pick me up at the station.' — 'Nothing doing.'
“我可以坐地铁，然后让戴维到车站接我。”——“不行。”
A 15-year-old girl was attacked at knifepoint in a subway
一名15岁的女孩在地铁里遭持刀袭击。
The pickpocket stole my purse in the subway.
扒手在地铁里偷走了我的钱包。
