my $book1 = "Don Quixote- Miguel de Cervantes";\nmy $book2 = "Les Mis\xc3\xa9rables -Victor Hugo";\nmy $book3 = "War and Peace - Leo Tolstoy";\n我想用来.subst将 中的“-”更改为“-” $book1，并将 中的“-”更改为“-” $book2。问题是我找不到正确的正则表达式来使用.subst. 我可以使用与正则表达式不同的东西，但我想使用.subst. 我可以对两个字符串使用不同的正则表达式，但两者都应该忽略$book3.
很抱歉问了这个可能是基本的问题。我一直在尝试不同的事情，但我总是毁掉部分文字。
\n我有这个文件:
Bulgaria = Bulgarian
Croatia = Croatian
Austria = Croatian
Czech Republic = Czech
Slovakia = Czech
Denmark = Danish
Germany = Danish
Belgium = Dutch
Netherlands = Dutch
Ireland = English
Malta = English
United Kingdom = English
Estonia = Estonian
Finland = Finnish
Belgium = French
France = French
Italy = French
Luxembourg = French
Austria = German
Belgium = German
Denmark = German
Germany = German
Italy = German
Luxembourg = German
Cyprus = Greek
Greece = …