All that ought to be known only to you has been known to all but you.（直译为：所有那些本应只有你知道的，却是大家都知道了，唯有你不知道。）
其中All that ought to be known only to you作主语（而这其中that ought to be known only to you作定语从句修饰all），意思是“所有那些只想让你自己知道的事儿”，be known to sb的意思是“被某人知晓”，all but you的意思是“除你之外的所有人”。句子主干是All has been known to all but you，其中前面的all指所有的事，后面的all指所有的人。