1. not producing an intended effect;

   "an ineffective teacher"
   "ineffective legislation"
   

2. producing no result or effect;

   "a futile effort"
   "the therapy was ineffectual"
   "an otiose undertaking"
   "an unavailing attempt"
   

3. lacking in power or forcefulness;

   "an ineffectual ruler"
   "like an unable phoenix in hot ashes"
   

1.不起作用的;徒劳无益的
If someone or something isineffectual, they fail to do what they are expected to do or are trying to do.

e.g. The mayor had becomeineffectual in the struggle to clamp down on drugs.
市长打击毒品的努力未见成效。
e.g. ...the well-meaning butineffectual jobs programs of the past.
过去的一些出发点很好但却无成效的就业计划

1.

1. 无效的：ineffectively 无效地 |ineffectual 无效的 |ineffectually 无效地

2. 白费的：ineffectivelyunavailingly 无效地 |ineffectual 白费的 |ineffectualinutileprofitlesspurposelessresultlessunavailingunserviceable 无益的

3. 无效的,不成功的：peer 注视,同等的人 |ineffectual 无效的,不成功的 | witness 目击者

4.

4. 无效果的,不起作用：industrialization 工业化 |ineffectual 无效果的,不起作用 | inevitable 不可避免的