本文通过对FORTRAN DO循环中数组元素下标式的函数性态的分析研究，给出了一种新的向量化算法——这种算法作者称为“相关函数法”。

By studying the functional properties of index expressions of array elements in FORTRAN DO-loops, a new algorithm, called the associative function algorithm, is developed.

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或者，通过使用一个“下标数组”，您可以对具有特定下标的元素有选择地进行操作。

Or you can operate selectively only on elements with certain indices, by using an "index array".

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对嵌套表达式求值的结果将被作为下标或键，用来检索集合或数组的适当元素。

The result of evaluating the nested expression will serve as the index or key for retrieving the appropriate element of the collection or array.

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