所有的字段都是成員字段，除非修飾符標記為 static 。Static字段用在類上，就像非靜態字段用在類的實例上。 > All ?elds are member ?elds unless the modi?er static is used. Static ?elds are used “on the class” whereas non-static ?elds are used “on a class instance”: ~~~ class Main { static function main() { Main.staticField; // static read Main.staticField = 2; // static write } static var staticField:Int; } ~~~ 靜態變量（第4.1節）和屬性（第4.2節）字段可以使用任意的初始化表達式（第5章）. > Static variable (4.1) and property (4.2) ?elds can have arbitrary initialization expressions (5).