By declaring it static, you save client code the overhead of creating an object.

通过声明为静态，为客户机代码节省了创建对象的工作量。

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Object expressions, which enable you to define small objects implicitly in expressions as needed, instead of declaring a new type and instantiating an object.

物件运算式，可让您在需要时于运算式中隐含定义小型物件，而不用宣告新型别以及具现化物件。

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