At the beginning when they designed the Channel Tunnel. Now,

來源: 於 2024-02-18 09:07:13 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次
How many rails are in the Chunnel?
 
two rail tunnels
 
The Chunnel actually comprises three tunnels: two rail tunnels, used for freight and passenger trains, and a service tunnel.