形容词
中文翻译：无效的
同义词：
['ineffective', 'incapable', 'inefficient']
例句：
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1. The new drugis nilpotent; it doesn't work for everyone.
这种新药无效，对每个人来说都不起作用。
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2. The scientist found that the experiment was nilpotent due to a lack of proper controls.
科学家发现实验无效，因为没有适当的控制。
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3. The company's product line is considered to be nilpotent because it doesn't meet consumer demand.
该公司的产品线被认为是无效的，因为它不能满足消费者的需求。