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1. The color contrast ratio of the new monitor is significantly better than the old one.
新显示器的对比度比例比旧的明显更好。
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2. The camera's contrast ratio has been improved to enhance image quality.
相机的对比度比例已经提高，以增强图像质量。
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3. The software developer adjusted the contrast ratio to improve readability.
软件开发者调整了对比度比例以提高可读性。