The Tsugaru Strait separates Hokkaido from Honshu, although the two islands are connected by the underwater railway Seikan Tunnel.
津轻海峡连接了北海道和本州岛，同时青函海底隧道也将两个岛屿紧密相连。
Theregion's unpredictable geology and its volcanic rock prevented engineers from using boring machines, forcing them to blast and dig their way under the Tsugaru Strait.
该地区不可预知的地质环境和火山岩结构迫使工程师放弃使用钻孔机，而是通过爆破在津轻海峡挖掘出一条通道。
Theregion's unpredictable geology and its volcanic rock prevented engineers from using boring machines, forcing them to blast and dig their way under the Tsugaru Strait.
该地区不可预知的地质环境和火山岩结构迫使工程师放弃使用钻孔机，而是通过爆破在津轻海峡挖掘出一条通道。
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