概述：

战后，政治漫画里开始出现一个名叫“山姆大叔”的人物。。。

Hints:

Uncle Sam

Brother Jonathan

the American Revolution

James Montgomery Flagg

World Wars I and II

PS:一处连字符；32秒与41秒左右有破折号

After the war, a character called Uncle Sam began appearing in political cartoons, his form evolving from an earlier cartoon character called Brother Jonathan that was popular during the American Revolution. Uncle Sam soon replaced Brother Jonathan as American's most popular symbol. The most enduring portrait of Uncle Sam was created by artist James Montgomery Flagg in his famous army recruiting posters of World Wars I and II. That version - a tall man with white hair and a small white beard on his chin, a dark blue coat and a tall hat with stars on it - was a self-portrait of Flagg.
战后，政治漫画里开始出现一个名叫“山姆大叔”的人物。他的原型是一个早期漫画人物，名叫乔纳森大哥，此人在美国独立战争时期非常出名。很快，山姆大叔就取代了乔纳森大哥，成了最受美国人欢迎的象征。最令人难忘的山姆大叔的画像是由画家詹姆斯•蒙哥马利•弗拉格创作的，用在两次世界大战期间他画的很多著名的征兵招贴画上。山姆大叔的形象是：高个子，白头发，下巴上有一小撮白胡子，身着深蓝色外套，头戴一顶高帽，上有星星点缀。这模样其实就是弗拉格的自画像。