129. The trouble is that part of the recent acceleration is due to the usual rebound that occurs at this point in a business cycle, and so is not conclusive evidence of a revival in the underlying trend.


1、该句的主语是The trouble,谓语是系表结构,第一个表语是that引导的从句:从句中的主语是acceleration,表语是due to...形容词短语,介词to后的名词the usual rebound又由that引导的定语从句(that occurs at this point in a business cycle)修饰。

2、第二个表语由and so连接,与前面表语是并列加因果的关系。due to...意为"由…引起的"。如:The team’s success was largely due to her efforts.