美国人声称曾祖父发明了法国三明治, California man claims great-grandfather invented French dip sandwich, challenging Philippe's story.

一位加利福尼亚男子认为他的曾祖父发明了法国三明治. A man in California believes his great-grandfather invented the French dip sandwich. 他声称他的祖先在一个百年前的当地餐厅创造了这道热门菜. He claims his ancestor created the popular dish at a local restaurant over a century ago. 要求挑战长期以来关于法国厨师菲利普的故事. The claim challenges the long-standing story about Philippe the French chef.