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　　(5)状语从句

　　例：While there are almost as many definitions of history as there are historians， modern practice most closely conforms to one that sees history as the attempt to recreate and explain the significant events of the past.

　　几乎每个历史学家对史学都有自己的界定，但现代史学家的实践最趋向于认为历史学是试图重现过去的重大史实并对其做出解释。

　　(6)同谓语从句

　　例：This trend began during the Second World War， when several governments came to the conclusion that the specific demands that a government wants to make of its scientific establishment cannot generally be foreseen in detail.

　　这种趋势始于第二次世界大战期间，当时一些国家的政府得出结论：政府要向科研机构提出的具体要求通常是无法详尽预见的。