Big Apple

Dating back to the early 1920's, this term refers to all horse racetracks around the city of New York. These tracks were the "big" money courses and the word "apple" refers to the prize. A few years later the term was used by musicians to describe the whole city. In the 1970's the term was used in a NYC tourism ad campaign and became famous.

(来源：英语麦当劳－英语杂志 www.EnglishCN.com)

(来源：EnglishCN英语问答中心[e问e答])

  (来源：英语学习门户网站EnglishCN.com)

  (来源：英语e问e答 http://ask.englishcn.com)

  (来源：英语美食指南 http://food.englishcn.com)

(来源：专业英语学习网站 http://www.EnglishCN.com)