Singleton classes destroyed by garbage collection, then reloaded.
单例对象被垃圾回收机制回收，然后单例类又被重新加载。
Jeremy believes that most programmers don't use Ruby's objects right, so his talk sheds some light onto advanced topics like singleton classes and the instance_eval.
Jeremy认为大多数开发者都没有正确的使用Ruby对象，所以他的话题比较高阶，谈论了诸如单例类(singleton classes)和instance_eval。
This class provides a set of classes, or a set of singleton object instances, that include all of the root-level resources and providers (classes annotated with @Provider) in a JAX-RS application.
此类提供了一组类或一组单例（singleton）对象实例，在一个 JAX-RS 应用程序内包括所有的根级别的资源和提供程序（由 @Provider注释的类）。
Classes implementing Singleton pattern will ensure that only one instance of the object ever exists at any one time.
使用类来实现单例模式可以确保在任何时间只有一个实例对象。
Classes implementing Singleton pattern will ensure that only one instance of the object ever exists at any one time.
使用类来实现单例模式可以确保在任何时间只有一个实例对象。
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