ineffective [ˌɪnɪˈfɛktɪv]

例句:

• If they prove ineffective they should be demoted or asked to retire.
  如果事实证明他们已无力胜任，应该将他们降级或让他们退休。
  来自柯林斯例句
• This is an ineffective method of controlling your dog.
  用这种方法控制你的狗不起作用。
  
• Economic reform will continue to be painful and ineffective.
  经济改革仍将举步维艰，毫无成效。
  
• Spokesman Bulama Mali Gubio said the force is ineffective.
  来自VOA
• These were extremely misguided, costly and grossly ineffective.
  来自SA
• Manual breast exams were pronounced to be completely ineffective.
  来自SA