n.潜艇,潜艇三明治，长卷三明治(用长卷面包纵向切开，内夹各种食物)
submarine的第三人称单数和复数

原形：submarine第三人称单数：submarines复数：submarines过去式：submarined过去分词：submarined现在分词：submarining

The destructive force of submarine earthquake is very strong.
海底地震的破坏力极强。
The goverment is building a submarine cable tunnel in this area.
政府正在这个地区修建海底电缆隧道。
The submarine pipeline was maliciously damaged recently.
海底管道最近被恶意破坏了。
The submarine sank to the bottom of the ocean, disappearing from sight.
潜艇沉入海底，消失在视线之外。
The crew of the submarine maintained strict radio silence during their mission.
潜艇的船员在执行任务期间保持严格的无线电静默。
She joined the navy and became a submariner, operating advanced submarines.
她加入了海军，成为了一名潜艇员，操作先进的潜艇。
The submarine launched a salvo of torpedoes at the enemy warship.
潜艇向敌军战舰发射了一连串鱼雷。
The captain ordered the submarine to surface in case of an emergency.
艇长命令潜艇在紧急情况下浮出水面。
Submarines are often used for covert operations due to their stealth capabilities.
由于其隐形能力，潜艇常用于秘密行动。
The submarine's nuclear propulsion system allows it to stay submerged for months.
潜艇的核动力系统使其能够潜伏数月之久。
The sonar detected an unknown object underwater, possibly another submarine.
声纳探测到水下有一个未知物体，可能是另一艘潜艇。
In World War II, submarines played a crucial role in naval warfare.
在二战中，潜艇在海战中发挥了关键作用。
After weeks of submerged travel, the submarine finally reached its destination.
经过几周的水下航行，潜艇终于到达了目的地。