Replacement字段在字符串内由花括号()标示。
Replacement fields are denoted by curly brackets () inside a string.
有些时候你需要使用圆括号对子表达式分组，但是却不想这个括号里面的内容再作为标示子表达式，在这种情况下可使用非标示圆括号？
Sometimes you need to group sub-expressions with parenthesis, but don't want the parenthesis to spit out another marked sub-expression, in this case a non-marking parenthesis ?
修改下列范例中标示的 XML 程式码，其方式是将葡萄牙文的「标题」一字加入到括号中的栏位标签。
Modify the XML, shown as highlighted in the following example, by adding the Portuguese word for "Title" to the field label in parentheses.
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