monochrome  
adjective uk/ˈmɒn.ə.krəʊm/ us/ˈmɑː.nə.kroʊm/
  (COLOUR)      
  黑白的;单色的
using only black, white, and grey, or using only one colour
  Kodak still produces monochrome film. 柯达公司依然生产黑白胶卷。 
 The park in winter is a depressing monochrome brown. 冬季公园里是一片令人抑郁的单调棕色。 
   (BORING)      
 mainly UK单调的,乏味的 
not interesting or exciting
  a monochrome, dreary existence 单调沉闷的生活