English sentence

這句其實用了倒裝法（inversion），而luck是動詞，不過是口語用多，即luck out意思是：走運；交好運；僥幸成功(be lucky or successful)；但yahoo字典，卻有多一個意思，湊巧碰上
這句可以寫成：(some of the most deadly warships ever built-submarine) (luck) （beneath the surface of the ocean）
即：(some of....)是subject
　　（luck）是verb
　　（beneath the surface of the ocean)是adverbial phrase
全句意思是：一些最厲害的軍艦潛艇在海面以下湊巧碰上。

2007-08-24 17:48:05 補充：
ever-built這個形容詞是用了past participle來做形容詞，可以看為 the most deadly warship submarines that have ever been built，若用中文可說成：史上最厲害的軍艦潛艇

見樓上兩位都似乎估唔到錯o個個字，我就多口答啦：
呢句係倒裝句（inversion），其中一種倒裝法就係將 adverb / adverbial + verb 移去 subject 之前（如 Into the room came John.）。
所以呢句之中有：
subject: some of the most deadly warships ever built；ever built 作形容詞用，係一個 participle clause，可視為一句省略o左o既 defining relative clause，呢度o既全寫就如 hahatse 所說：... that/which have ever been built
adverbial: beneath the surface of the ocean
verb: 應該係 lurk（潛伏），講潛艇嘛，唔通成日o係水面咩
圖片參考：http://hk.yimg.com/i/icon/16/3.gif

注意，submarines 係後補去開故講俾讀者知個 warships 係乜野，所以用左破折號（dash），應有兩個 "--"；一個 "-" 係 hyphen。

Adverbial clause [ Beneath the surface of the ocean ]
Verb [ luck >> lie ]
Subject [ some of the most deadly warships ever built ]
Futher explanation of thoughts, preceded by a dash [ -- submarines]

luck 字該是寫錯了