2017考研英语长难句分析每日一句(787) But particularly when viewed against America'sturbulent past, today's social indices hardlysuggest a dark and deteriorating socialenvironment.
【分析】复合句。逗号前面是省略了主语和系动词的 when引导的时间状语从句,补充完整的形式为 ...when today'ssocial indices viewed against...;逗号后面是主句。