undersea tunnel的用法和樣例：
例句
- Construction of China's second undersea tunnel has kicked off yesterday in Qingdao City, east China's Shandong Province.
中國的第二條海底隧道昨天在中國東部的山東省青島市舉行了開工儀式。 - The WHC is a dual three-lane, immersed-tube road tunnel linking the West Kowloon Expressway with the Western District.
西區海底隧道是一條雙程三線沉管行車隧道，連接西九龍快速公路與港島西區。
