subway

[英]
地铁;地下通道
A subway system whose reputation for violence and lawlessness makes it a no-go area for many natives of the city.
暴力和违法事件时有发生、被本市很多市民视为危险区域的地铁系统。
A quarter-mile of subway can cost billions.
建设四分之一英里的地铁即需要投入数十亿美元。