• 1. decrease by: 减少了 | 下降了
• 2. decrease by degrees: 递减
• 3. decrease by degress: 依次减少

更多释义

• 1.A similar situation occurred to social science and business which saw a decrease by 70% and an increase by 85% respectively.
  差不多的状况发生在社会科学与商务这两门课程上，两者分别出现了70%的下降和85%的增长。
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• 2.This five-year program stresses that energy consumption intensity per unit GDP shall decrease by 20% in the next five years.
  强调未来五年单位GDP的能源消耗要降低20%。
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• 3.Noss's efforts seem to be paying off. He says he has seen employee satisfaction rise and turnover decrease by a noticeable percentage.
  诺斯的努力似乎已经渐收成效，他表示员工对公司的满意度大幅提升，员工跳槽的频率也明显降低。
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