For example, if you select &quot; cold &quot; , and enter &quot; weather &quot; as the 1st key and &quot; winter &quot; as the 2nd key, the index entry is &quot; weather, winter, cold &quot; .
将当前选择设定为第一个关键字的第二级子条目。例如，如果选择 &quot; cold &quot; ，并输入 &quot; weather &quot; 作为第一个关键字，输入 &quot; winter &quot; 作为第二个关键字，则索引条目为 &quot; weather, winter, cold &quot; 。