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。
2
Some cars have variable-ratio steering, which uses a rack-and-pinion gear set that has a different tooth pitch (number of teeth per inch) in the center than it has on the outside.