switchover ['swɪtʃoʊvə(r)]

例句:

• Signal switchover design of mobile communication system for subway is studied preliminarily.
  对地铁移动通信系统切换方案设计进行探讨.
  
• A switchover to endosperm dependency occurs around the heart - shaped stage.
  对胚乳依赖的改变发生于近心形期.
  
• The switchover determined the marketable roomage and developmental orientation in Jiujiang.
  这种角色换位决定了九江的市场空间和发展方向.
  
• When exactly does the digital switchover cash switch over?
  来自BBC
• This means the products will work during the switchover.
  来自THETIMES
• The great digital switchover is upon us.
  来自THETIMES