gradations
n.
（从一事物到另一事物的）渐变( gradation的名词复数 );
（事物划分的）阶段;
等级;
刻度;
例句:
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the gradations on a thermometer
温度计上的刻度
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But TV images require subtle gradations of light and shade.
但是，电视影像要求有十分细微的光影变化。
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There are many gradations between good and bad.
在好与坏之间还有许多不同的层次.
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Passing by insensible gradations into the next sense.
来自Oxford English Dictionary
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There are no gradations of non-scientific-ness.
来自SA
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He's more interested than I have ever been in very subtle gradations.
来自NEWYORKER