ineffective

adj.

无效果的；低效率的；不起作用的；无能力的

1. This medicine turned out ineffective.
   这药证明是无效的。
2. Your solution to the problem is proving ineffective.
   你对于这个问题的解决办法被证明是无效的。
3. An ineffective person should not be our leader.
   无能的人不该当我们的领导者。
4. Her self-distrust made her work ineffective.
   由于他没有自信致使工作失去效率。
5. He's ineffective because his approach is too rigid.
   他做什么事情都是按图索骥，效率太低。

Flexible sigmoidoscopy may be ineffective for secondary prevention of colorectal cancer in asymptomatic, average-risk men.
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Exopolysaccharide-deficient mutants of Rhizobium meliloti that form ineffective nodules.
Teaching pharmacology in clinical environment: evaluating and comparing of educational performance in effective and ineffective clin...
Bone densitometry: Expanding indications are ineffective - Calculations based on the Frax algorithm
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Polish foreign policy, 1933-1939 : an ineffective attempt at a balance of power system /
Initial B-cell responses to transmitted human immunodeficiency virus type 1: virion-binding immunoglobulin M (IgM) and IgG antibodie...