gradation
柯林斯词典
1. N-COUNT Gradations are small differences or changes in things. 渐变[正式] [usu pl, with supp]
But TV images require subtle gradations of light and shade. 但是电视影像需要有细微的光影变化。
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gradation /ɡrəˈdeɪʃən/ (gradations)
剑桥词典
gradation noun [C or U] (CHANGE)
a gradual change , or a stage in the process of change
逐渐的变化；（变化过程的）阶段，层次
The gradation in/of tempo in this piece of music is very subtle . 这支曲子节奏的变化非常微妙。
gradation noun [C or U] (MARK)
(one of) a set of marks showing units of measurement on a jug , tube , or instrument
刻度，量度
the gradations on a ruler 尺子的刻度 返回 gradation