沉入水下

潜入水下

swim underwater───潜泳

underwater───adj.在水中的；水面下的；adv.在水下；n.水下

went under───沉没

marine underwriter───海上承保人

long underwear───长内衣

test the water───试探，摸底

to underrate───低估

marine underwriters───海上承保人

Manx shearwater───曼克斯剪切水

When I went underwater for the first time I was absolutely shocked.───第一次潜入水底时我完全震惊了。

We went to the elderly Stone Beach, also went to the underwater world.───我们去了石老人海滨浴场，还去了海底世界。

To help solve this mystery, scientists went on an ocean expedition to drill into a large, 145-million-year-old underwater supervolcano.───为了解开这个谜，科学家们进行了一次海洋探险，去钻探145亿年前就在水下存在的超级火山。

And it all happened so quickly I then -- I don't know how it happened -- but I went underwater.───这一切发生的如此之快然后--我不知到是怎么发生的--但是我沉入水底。