While static properties are often declared private to prevent meddling, there is one way of creating a read-only statically scoped property: You can declare a constant.

尽管静态属性通常被声明为private来防止别人干预，但有一种方法可以创建只读静态范围的属性，即声明常量。

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You can declare a new NAMESPACE constant, which is implicitly made a constant and from the character data type.

可以声明一个新的NAMESPACE常量，这隐式声明了一个字符数据类型的常量。

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It would be better if you could give this constant a name and then use it everywhere in the program. You could, of course, simply declare it as a local variable by writing.

这样的话，如果可以给这个常量一个名字，然后在程序所有需要的地方通过名字来使用这个常量，将会非常方便。

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