单例对象被垃圾回收机制回收，然后单例类又被重新加载。
Singleton classes destroyed by garbage collection, then reloaded.
该寄存器机器还要基于向量模型来管理内存，并实现垃圾回收机制。
In the Virtual Register Machine, the memory is managed through vector model with the garbage collection facility.
他们可以通过对象是如何销毁的来区别：有两种方法——通过程序直接销毁或者通过语言的垃圾回收机制。
They differ in how the objects are deleted: there are two approaches - direct deletion by the program or garbage collection by the language.
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