Peru is a country onthe Pacific coast of South America. It has three main geographical areas: anarrow coastal belt; the Andes Mountains running parallel to the coast; andhigh, flat plains in the southeast. 介词短语on the Pacific coast of South America作定语修饰county中心词。现在分词短语runningparallel to the coast作定语修饰the Andes Mountains中心词，相当于which run parallel to the coast定语从句，其中running: extendin a particular direction(延伸)之意。形容词短语parallel to the coast作方式状语。
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