The USS Hartford, a billion dollar nuclear attack submarine is participating in Ice X 2016.
价值十亿美元的核攻击潜艇 USS Hartford 正在参加 Ice X 2016。
Nuclear attack submarine
原声例句
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SSN (hull classification symbol)
（重定向自Nuclear attack submarine）
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An SSN is a nuclear-powered general-purpose attack submarine. SSN is the US Navy hull classification symbol for such vessels; the SS denotes a submarine and the N denotes nuclear power. The designation SSN is used not just in the United States Navy (USN), but throughout NATO under STANAG 1166.
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