数字电视图像的清晰度很高。

The definition of the digital TV pictures is excellent.

《牛津词典》

即去除了闪斑噪声，又提高了图像的清晰度。

The method not only removes the speckle noise, but also enhances contrast.

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但混合无线电波也会降低图像的清晰度以及分辨率。

But combining radio waves also makes for less sharp, lower resolution images.

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