详细说明：串的查找与替换 打开一篇英文文章，在该文章中找出所有给定的单词，然后对所有给定的单词替换为另外一个单词，再存盘-Descr iption: Find and replace strings open an article in English, to find all the words given in the article, and then replace all the given word for another word, and then save the file