rapid transit railways

• 高速铁路

rapid transit railways的用法和样例：

例句

1. Successful development of the crane solves the problems of high-speed railways' unballasted track laying and brings obvious economic and social benefits.
   博格板大悬臂门式起重机的研制成功解决了高速铁路无碴轨道板的铺设难题，创造了明显的经济和社会效益。