Search can be facilitated by presenting one set of distractors before the second set of distractors and the target: the preview effect.
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Preview the form to see the effect; it should look like figure 22.
预览表单以查看效果；它的外观应该类似于图22。
You can play with the effect by changing the delay time, decay factor, and clicking Preview until you have the exact sound effect you want.
您可以通过更改延迟时间、衰减系数和单击p review播放效果，直到您获得想要的音效为止。
Finally, you can preview the sound effect by clicking preview in the Echo window, shown in Figure 4.
最后，您可以单击echo窗口的Preview预览音效，如图4所示。
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