First, paint a mask and then continue to select an effect that will only be applied to the masked areas.

首先，画一个面罩，然后继续，效果只会适用于这些带面具罩的区域。

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Objective:To observe the relationship between the tinnitus masking curve and the effect of masking therapy, so as to select an effective treatment method.

目的：观察耳鸣掩蔽曲线与掩蔽治疗效果之间的关系，为合理选择有效的治疗方法提供依据。

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Note that an order by clause in the SELECT statement would not have any effect on the order of the array elements, as it would apply to the rows returned by the statement.

请注意，select语句中的ORDER BY子句不会对阵列元素的顺序产生任何影响，因为它将应用于该语句返回的行。

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