( 1997年真题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.
译文:同任何发达国家一样,在美国,所有社会相互关系下面都隐含着一系列复杂的文化信号、信念和习俗。
分析:句子的主干结构是... cultural signals, assumptions, and conventions underlies... interrelationships。