当您将一个变量赋值给任何列表时，您就为该列表分配了一个指针或引用。
When you assign any list to a variable, you're really assigning a pointer or reference to the list.
层次分析法确定各个指标之间的关系，使评价指标的权重分配赋值更加科学、合理。
Analytic Hierarchy Process to determine the relationship between the various indicators to evaluate the distribution of weights assigned more scientific and rational.
如果我们将一个变量赋值给另外一个变量，在堆栈中则会创建两个不同的复本，尽管它们的数据是一样的，因此，在堆栈中分配了两块空间。
If we are assigning one value variable to the other variable, it creates two distinct copies of the same data on the stack. So now in the stack there are two Spaces allocated.
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