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".
RAND _ LOOKUP，随机查找函数，该函数根据作为查找表中下标的随机数从查找表中选择目标列的值。
RAND_LOOKUP, a random lookup function that selects a value for the destination column from a lookup table based on a random number as the subscript in the lookup table.
更常见的是用一个或一组值，例如一个索引寄存器或下标的值来寻找一个特定数据元素。
More generally, a value or set of values, such as an index register or a subscript, used to locate specific data.
大多数情况下，这种情况不会发生，哈希函数需要把较大的关键字值范围压缩成较小的数组下标的范围。
In most cases neither of these situations exist, and the hash function will need to compress a larger range of keys into a smaller range of index Numbers.
大多数情况下，这种情况不会发生，哈希函数需要把较大的关键字值范围压缩成较小的数组下标的范围。
In most cases neither of these situations exist, and the hash function will need to compress a larger range of keys into a smaller range of index Numbers.
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