动词短语中文翻译
中文翻译：没有效果
同义词：
['be of no avail', 'be useless for', 'be ineffective']
例句：
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1. I tried toconvince him that his ideas were useful, but he just laughed at me.
我试图说服他，他的主意是有用的，但他嘲笑了我。
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2. The new policy was supposed to have a positive impact on the economy, but it turned out to be quite ineffective.
新政策本应对经济产生积极影响，但事实证明它非常无效。
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3. The doctor advised against taking medication without consulting a specialist, but she ignoredhis advice and took the medicine anyway.
医生建议在咨询专家之前不要服用药物，但她不听劝告，还是吃了药。