高架铁路

例句：

1. 1. The high-speed railway connects several cities in the north and south of China.
   中国南北的高铁连接了多个城市。
2. 2. The construction of the high-speed railway has greatly improved transportation efficiency.
   高铁的建设极大地提高了交通效率。
3. 3. The high-speed railway is a symbol of modern transportation technology.
   高铁是现代交通技术的象征。