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潜艇巨大的威力,在于它有极大的隐蔽性,能出其不意地在水下攻击敌方舰艇。但现代潜艇的最大弱点,就在于螺旋桨推进发出的
The immense power of the submarine lies in its great concealment, capable of attacking enemy ships underwater unexpectedly. However, the biggest weakness of modern submarines lies in the propeller