weathercock [ˈweðərkɑ:k]

例句:

• A weathercock and an artful person, he spoke a lot of beautiful words to please people.
  他这个人,见风使舵,八面玲珑,说了不少使大家高兴的话.
  
• A high weathercock frequency is essential for the stability of the guidance loop.
  从制导回路的稳定性角度来看,短周期振荡频率高是基本的.
  
• I can't make any plans with you as changeable as a weathercock.
  你一会儿一个想法,我怎么订计划.
  
• In affairs of the heart, Mr. Turchill belonged to the weathercock species.
  来自M. E. Braddon