seikan tunnel

基本解释

This would exceed the combined lengths of the two longest undersea tunnels on Earth, the Seikan Tunnel and the Channel tunnel.
這將超過地球上兩個最長的海底隧道青函隧道和英法隧道的長度縂郃。
Thee tunnel has overtaken Japan's 53.9km Seikan rail tunnel as the longest in the world and pushed the 50.5km Channel Tunnel linking the UK and France into third place.
這條隧道超越了此前的世界之最--日本全長53.9公裡的青函海底隧道，將全長50.5公裡的英吉利海峽隧道擠到了第三的位置。
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The Tsugaru Strait separates Hokkaido from Honshu, although the two islands are connected by the underwater railway Seikan Tunnel.
津輕海峽連接了北海道和本州島，同時青函海底隧道也將兩個島嶼緊密相連。