The Gotthard base tunnel, 57 kilometres long, will carry high-speed trains through the heart of the Alps.

哥达基线隧道全长57公里，它能让高速列车穿过阿尔卑斯山脉的核心地带。

youdao

Why It's Unique: Despite the mountainous topography of the region, trains traveling through the Gotthard Base Tunnel willremain at nearly the same elevation for the entire trip.

独特之处： 尽管该地区属于山地地形，但通过圣哥达基地隧道的火车在整个行程中几乎处于同一海拔高度。

youdao

The 95.3-mile (153.5 km) long Gotthard Base tunnel network now being drilled out beneath the Alps, when finally completed in about ten years, will be the longest underground tunnel ever constructed.

目前正在阿尔卑斯山脚开凿的圣哥达隧道网长95.3英里(153.5公里)，将在10年以后完工，也将是有史以来最长的地下隧道。

youdao