Photos taken by compact cameras are often dark because they're slightly underexposed.
袖珍相机所拍的照片往往比较暗，因为存在轻微的曝光不足。
柯林斯例句
The film is underexposed, so the image is very dark.
这些胶片曝光不足, 因此影像很暗.
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You can also shoot underexposed or overexposed pictures intentionally.
您也可以特意拍摄曝光不足或过量的照片.
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The film was underexposed.
底片曝光不足.
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The child was underexposed to language.
这个孩子对语言曝光不足.
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The shutter speed flashes in the viewfinder display when the subject is underexposed or overexposed.
当被摄体呈欠曝光或过曝光时,快门速度将在取景器中起闪烁.
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