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。
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。
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.
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