请教一个语法问题，谢谢！

来源: 于 2015-12-30 18:53:30 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

请教一下句号到底在引号里还是引号外，比如

1) I believe that "The earth is round." Unfortunately, .....

2)  I believe that "The earth is round". Unfortunately, .....

 

1)和2）哪个是对的？

谢谢！