名词
中文翻译：无效性
同义词：
['inefficiency', 'ineffectiveness']
例句：
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1.The new policy has been shown to be ineffective at improving student performance.
新政策已被证明在提高学生表现方面是无效的。
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2. The manager's decision was seen as ineffective because it did not address the root cause of the problem.
经理的决定被认为无效，因为它没有解决问题的根本原因。
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3. The company's marketing strategy was deemed ineffective due to its lack of focus on customer needs.
公司的营销策略因缺乏对客户需求的关注而被认为无效。