Therefore, the result returns only the addresses from the first instance because the element does not exist in the second instance.
因此，结果仅返回第一个实例中的地址，因为第二个实例中不存在元素。
That way, you can compare a column in the first instance of the table to the same column in the second instance, which allows you to compare the values in a column to each other.
这样，可将表的第一个实例中的列与第二个实例中的同一列相比较，这样可相互比较列中的值。
In the second instance, the team experienced only one day of wait time.
在第二个实例中，团队只经历了一天的等待时间。
In the second instance, proper selling reduces the likelihood of incurring major losses.
第二，正确卖出可以减少遭受重大损失的可能性。
In the second instance, data from a database is encoded before being displayed.
第二个例子中，来自资料库的资料在显示前已经编码。
In the second instance, data from a database is encoded before being displayed.
第二个例子中，来自资料库的资料在显示前已经编码。
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