修改的类装入器使用看上去几乎与普通类文件完全一样的模板文件，不同的是这个模板文件在常量池中有一些“洞”，在装入时为每个实例化类填充这些“洞”。

A modified class loader USES template files that look almost exactly like ordinary class files except for "holes" in the constant pool that are filled in at load time for each instantiation class.

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许多蛤类利用双壳及内部柔软强健足部的交替运动在河床上掘洞来逃避天敌。

Many types of clam escape predators by burrowing into the sea bed using alternating movements of their shell and of the soft, muscular foot contained within that shell.

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