摘要:公共英語三級考試閱讀難點句型分析之非謂語動詞,更多關于公共英語三級備考消息,請關注希賽網英語頻道。
【難句】The energy used to separate oxygen from air before burning is almost as great as that needed to filter out nitrogen afterwards, leading to a similar loss of efficiency. (The Economist Nov. 30, 2006)。
【結構分析】本句是一個簡單句,為一個主系表結構The energy is almost as great as that needed to filter out nitrogen afterwards,使用了as…as…結構,其中被比較的對象that needed to filter out nitrogen afterwards中,that指代上文的energy,過去分詞結構needed to…作后置定語體現被動。其中主語energy由過去分詞結構used to separate oxygen from air before burning 作后置定語體現被動;句末的現在分詞結構leading to a similar loss of efficiency作全句的結果狀語。
【參考譯文】 燃燒前將氧氣從空氣中分離所需的能源幾乎不亞于上述將氮氣過濾所需的耗費,這就使得兩者在效率損失上不相上下。
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