line的组合词为railway-line
例句
1、
The railway line was electrified in the 1950s.
这条铁路线在20世纪50年代就实现了电气化。
2、
Take the narrow lane going north-west parallel with the railway line.
走和铁路线平行的那条西北向的窄巷。
3、
The railway line follows the river for several miles.
铁路线沿着河流延伸几英里。