Traditional image enhancement algorithm enhances the contrast grade and noise of image at the same time. So, noise reduction is needed.

传统图像增强算法在增强对比度的同时，也很大地提升图像噪声，需要对图像进行降噪处理。

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By contrast, Anki estimates how soon you will next see the card right before you grade it (you are still supposed to grade by difficulty, but the dates are also right there for your consideration).

相反，anki是在你对卡片打分之前就估计你下次看这个卡片的频率(你仍然可以对卡片评分，不过卡片出现的日期仍然在那里)。

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The contrast shows that the top grade engine oils are being developed toward fuel economic and environmental protection.

通过对比可以看出，高档内燃机油越来越注重节能以及环保的要求。

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James Blythe, now a student at Oxford, was given a D grade for coursework in his history A-level last year - in contrast to much higher marks for other parts of the exam.

BBC: A-level marking 'grossly unjust'

The TD 40 family features Professional Grade IPS panels with 1920x1080 full HD resolution and 20, 000, 000:1 Dynamic Contrast Ratio for stunning picture and color performance.

ENGADGET: ViewSonic outs three Windows 8-certified touchscreen displays