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| 文档标题： | 跨文化视角下对中美公益广告表现手法差异的研究_商务英语论文 |
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| 文档简介： | Abstract Public service advertisements originated in United States in 1940s to support World War Two. At that time, Ad Council claimed that public service advertisements aimed to publicize right social notions and healthy life style. Nowadays, PSAs s... |
