submarine
US /ˌsʌb.məˈriːn/
UK /ˌsʌb.məˈriːn/

1.
潜艇
a warship with a streamlined hull designed to operate completely submerged in the sea for long periods, equipped with a periscope and typically armed with torpedoes or missiles.
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The submarine surfaced after a week underwater.
潜艇在水下待了一周后浮出水面。
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They detected an enemy submarine near the coast.
他们在海岸附近发现了一艘敌方潜艇。
1.
海底的, 水下的
existing, occurring, or done under the surface of the sea.
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They explored the submarine caves.
他们探索了海底洞穴。
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The earthquake caused a massive submarine landslide.
地震引发了一场巨大的海底滑坡。