That's because variables specified in a closure's use keyword are lexicallyscoped.
这是因为在closure的关键字use中指定的变量在词法上确定范围。
2
Lexicallyscoped variables refer to the local environment in which they were defined.
在词法上确定范围是指在本地环境中定义变量。
3
MXML files are, at heart, well-formed XML files, which means the XML namespaces serve the same purpose as any XML namespace does, that of keeping different tag names lexicallyscoped.