( 1997年真題Section III Reading Comprehension Text2第5段 第1句)
As is true of any developed society, in America a complex set of cultural signals, assumptions, and conventions underlies all social interrelationships.
譯文:同任何發達國家一樣,在美國,所有社會相互關系下面都隱含著一系列復雜的文化信號、信念和習俗。
分析:句子的主干結構是... cultural signals, assumptions, and conventions underlies... interrelationships。