Furthermore, an object in memory can be referenced by multiple references that could be strong, soft, weak, or phantom. Before proceeding further, let's look at some terminology.
而且，内存中的一个对象可以被多个引用(可以是强引用、软引用、弱引用或虚引用)引用。
Enter reference number where multiple references exist.
如果存在多个引用，请输入引用号。
Enter reference number where multiple references exist.
如果存在多个引用，请输入引用号。
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