And so, there is the distinction between fixed schedules versus ratios, variable schedules and ratio versus interval.

因此，在固定时程与变化时程之间,以及在比率与间隔之间，存在着一些区别。

耶鲁公开课 - 心理学导论课程节选

Change the independent variable, find the change in the function, take the ratio and that's the derivative.

改变自变量,算出函数的变量,计算比值,这就是求导

耶鲁公开课 - 基础物理课程节选

Last year, there was a significant increase in the ratio of variable staff costs to total staff costs, rising to 13.4 percent and as a proportion of revenue, rising to 7.8 percent, representing the highest ratios for the last 10 years.

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In a serious setback for the UK's fight to head-off some of the remuneration curbs, the European parliament late on Wednesday night secured agreement on a mandatory 1:1 ratio on salary relative to variable pay, which can rise to 2:1 with explicit shareholder approval.

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Its Variable Compression Engine can alter its compression ratio (the volume in a cylinder when the piston is up compared with the volume when it is down) from 14-1 to 8-1, depending on the circumstances.

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