每一个下标的描述和用法在下面介绍。
A description of each suffix and its usage is presented in the sections below.
但同时，可以在无需下标的情况下引用“独生子”节点。
But at the same time, you can refer to an "only child" node without having to subscript. For example.
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".
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.
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.
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.
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