be inefficacious
The treatment was inefficacious.
这种治疗无效。
无效的；不奏效的
无法产生预期结果的。；无效的；不灵验的。；无效果的；[医] 无效的；无效力的
not able to produce the intended or desired effect
无法产生预期结果的。
Incapable of having the intended consequence.
无效的；不灵验的。
Not effective.
The medicine proved inefficacious in treating the disease.
这种药物被证明对治疗这种疾病无效。
用法提示：inefficacious 作表语，表示药物无法产生预期效果。
Despite their best efforts, the strategies were inefficacious against the crisis.
尽管他们尽了最大努力，这些策略对危机仍无效。
用法提示：inefficacious 作表语，描述策略无法应对危机。
His attempts to convince the committee were deemed inefficacious.
他试图说服委员会的努力被认为无效。
用法提示：inefficacious 作主语补足语，说明尝试无效。
The treatment was inefficacious.
这种治疗无效。
The new drug proved inefficacious in clinical trials.
这种新药在临床试验中被证明无效。
The policy was inefficacious in reducing pollution.
该政策在减少污染方面无效。
inefficacious 强调治疗、药物等缺乏特定效力，较正式；ineffective 更通用，指人或事物无法达到预期效果，使用更广。
inefficacious 指缺乏效力，无法产生预期效果；inefficient 指资源利用不佳，效率低，常描述过程或系统。
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