The concept of loss ratio of recovery factor and the influence of numberratio of injection-production Wells on it are advanced.
提出了采收率损失率的概念及注采井数比对采收率损失的影响。
2
Contrast ratio: a numberratio resembling 1:1 or 10, 000:1, which illustrates how much difference there is between the brightest whites and the darkest black colors the screen can display.
对比度：一个比值，如1：1或10,000：1，代表屏幕所能表现出的最亮白色和最深黑色之间的差值。
3
The ratio of needs and number of helpers will guide this procedure.