gradation

n

• ① (色彩、色调的)渐变,浓淡法;(照片的)渐明或渐暗;累进;次第
  • by gradation逐渐地
  • the gradation from one's former simplicity to one's present sophistication从过去的单纯渐变到现在的世故

• ② 1定次序;分等级2次序;等级;阶段
  • There are many gradations between poverty and wealth.贫富之间有许多等级。