downgrading [ˌdaʊn'ɡreɪdɪŋ]

例句:

• That we caused a downgrading of U.S government securities?
  来自VOA
• And by downgrading, he means they're upgrading to an older, more familiar experience.
  对于降级, 他是指他们正在升级到一个更老的 、 更熟悉的体验.
  
• For those now staying at less expensive properties , the downgrading brings some discomforts.
  对那些现在改住较便宜饭店的高阶主管来说,饭店降级使得住起来不再那么舒服.
  
• Nor is it true that these show a downgrading of global warming.
  来自THETIMES
• The historical downgrading of our Neanderthal cousins has gone well beyond the scientific.
  来自BBC