Each of the elements is a single-dimensional array of integers.
每个元素都是一维的整数阵列。
Gets the element at the given position, treating the array as a zero-based, single-dimensional array.
取得指定位置上的元素，并将此阵列视为以零起始的一维阵列。
The result is an array of arrays, which is flattened to a single dimensional array of server IP addresses and passed back to the caller.
这个结果是一组数组，它紧贴服务器IP地址的一维数组，并且传回给调用者。
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