The monorail lines, or elevated single-rail tracks, can be built on road dividers and are especially cost-effective because they cost one-sixth of the price of an underground railway system and are cheaper to maintain, according to industry experts.

Ví dụ, các bài viết liên quan đến từ monorail. Các từ vựng liên quan đến từ vựng trong câu ví dụ.