名词
中文翻译：无效
同义词：
['ineffectiveness', 'incapacity', 'inefficiency']
例句：
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1. The newpolicy has been shown to be inefficient in reducing pollution.
新政策已被证明在减少污染方面效率低下。
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2. The machine is inefficacious at performing the task it was designed for.
这台机器在执行其设计任务时显得无能为力。
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3.The scientist's theory was found to be inefficacious in explaining the phenomenon.
科学家的理论被发现在解释这一现象时是无效的。