multistage ['mʌltɪˌsteɪdʒ]

例句:

• Multistage sampling in forest inventory is not restricted to fixed - area sampling units.
  森林资源清查中,多阶抽样并不局限于固定面积的抽样单元.
  
• A multistage rocket projects missiles into space.
  多段式火箭把导弹发射至空中.
  
• A multistage operation improves the thermal efficiency.
  多层操作可以提高热效率.
  
• It was hard to do, mainly because OPCs form very late in the body's development, via a multistage and complex process.
  来自WSJ
• But multistage fracks were unreliable, Brown said: People called them fancy fracks, because they cost more but didn't work.
  来自NEWYORKER