gradation

n.

（从一事物到另一事物的）渐变；（事物划分的）阶段；等级；刻度

复数：gradations

color gradation色阶

1. I have noticed the subtle gradation in colour in this painting.
   我已经注意到这幅画中色彩的渐变。
2. A good actor can express every gradation of feeling from joy to grief.
   一名好演员能够表现出由快乐至痛苦的每一阶段的感情变化。
3. It was hard to understand all the minute gradations of their bureaucracy.
   很难弄清楚他们那套官僚体制全部细微的层次分别。

The Semantics of Gradation
Gradation processing method and apparatus for radiation image recording system
Gradations in digital inclusion: children, young people and the digital divide
Intergradations. (Book Reviews: Hybrid Zones and the Evolutionary Process.)
Optimization of Aggregate Gradation & Concrete Maturity
On proportional ratio design of cement stable gradation broken base
Research on Effect of Full Responsibility Gradation Nursing Model on Basic Nursing Quality
Distribution and possible intergradation between Macaca tonkeana and M. ochreata at the borderland of the species in Sulawesi
Etude de la biodégradation ou de la dégradation in vitro de molécules à structure lactame : la primidone...
Clinal variation at microsatellite loci reveals historical secondary intergradation between glacial races of Coregonus artedi (Teleo...