reduction  
noun uk/rɪˈdʌk.ʃən/ us/rɪˈdʌk.ʃən/
  (MAKING SMALLER)        
B2 [ C or U ]减少;减小;降低;缩小 
the act of making something, or of something becoming, smaller in size, amount, degree, importance, etc.
  a reduction in traffic 交通量的减少 
 huge price reductions 大减价 
  [ C ]缩影(照片或图片的一个拷贝,比原件小) 
a copy of a photograph, picture, etc. that is smaller than the original one
 - More examples
- The treaty has led to a dramatic reduction in the number of land-based missiles in Europe.
- Stiffening competition in the market has led to a reduction in the company's profits this year.
- The reduction in funds is throttling the development of new programmes.
- The airline halved its overseas service because of a sharp reduction in traffic.
- The Green Party have called for a substantial reduction in the emission of greenhouse gases by the UK.