If a page action method invocation returns a non-null string value, Seam treats it as a navigation event.
如果页面动作方法调用返回一个非空字符串值，则Seam将其当作一个导航事件。
In April of 2002, the XML Working Group of the W3C announced it was considering a revision of XML namespaces that would permit the assignment of a namespace prefix to the null string.
在2002年4月，W3C的XML工作组宣布它正在考虑修订XML名称空间，可能会允许把名称空间前缀指定为空字符串。
A null string contains zero characters or only Spaces or tabs.
空字符串包含零个字符或只有空格或制表符。
To let users select the file to import, specify a null string for filename.
为了让用户选择要导入的文件，文件名指定一个空字符串。
Both null and undefined macros expand to null strings, but a macro defined as a null string is considered defined in preprocessing expressions.
空宏和未定义的宏都展开为空字符串，但定义为空字符串的宏被视为是在预处理表达式中定义的。
Null string variant cannot be converted to a character.
不能将空字符串变量转换为字符。
Null string variant cannot be converted to a character.
不能将空字符串变量转换为字符。
应用推荐