Besonderhede van voorbeeld: 9207254567161005420

English

d is a prefix meaning difference between two values; for instance, dY might represent a distance along the Y-axis of a graph, while a variable just called y might be an absolute position.

Chinese

d 是一个前缀表示两个值的区别,例如,dY 可能代表一个图形沿Y轴的距离,而一个仅仅叫做y 的变量可能是一个绝对坐标。