As the value in the Threshold field changes in the animation, the color of a state or territory changes based on the food stamp participation rate of that state.
由于Threshold字段中的值是动态变化的，所以州或属国的颜色会根据这个州的食品券参与率而改变。
Lower the threshold if your camera has a higher color-constancy per pixel.
如果摄像机的像素颜色稳定性比较高，那么可以降低这个阈值。
The foreground object does not trap this background color because of the threshold Settings currently set in the preferences dialog box.
前景色因“设置”对话框中当前所设临界值而不对这种背景色补漏白。
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