They resonated(共鳴) with optimism and ambition in much the same way as the most famous dream speech of all, delivered by Martin Luther King Jr.
出自-2013年12月閱讀原文
柯林斯高階英漢雙解學(xué)習(xí)詞典釋義
（用于男子名后以區(qū)別于家族中同名的長(zhǎng)輩）
Jr is a written abbreviation for (書(shū)面縮略=) Junior. It is used after a man's name to distinguish him from an older member of his family with the same name.
例句
...Harry Connick Jr.小哈里·康尼克
英英詞典釋義
Noun
1. a son who has the same first name as his father