n.无效；无效力

The inefficacy of the old teaching methods became apparent when compared to the newer, more interactive techniques.
这种旧的教学方法的无效性在与更新、更具互动性的教学技术相比较时变得明显。
Despite numerous attempts, the inefficacy of the drug in treating the rare disease was confirmed by the researchers.
尽管尝试了多次，研究人员还是证实了该药物对治疗这种罕见疾病的无效性。
Due to the inefficacy of traditional painkillers, doctors decided to explore alternative treatments for chronic pain patients.
由于传统止痛药的无效性，医生决定探索慢性疼痛患者的替代疗法。
The company's inability to address customer complaints, also known as their inefficacy, led to a significant loss in clientele.
公司无法解决客户投诉，即其无效性，导致大量客户流失。
Critics pointed to the inefficacy of the policy in reducing crime rates and demanded a new approach to public safety.
批评者指出这项政策在降低犯罪率方面的无效性，并要求采用新的公共安全策略。
The inefficacy of the antivirus software against the latest malware strains necessitated an urgent update.
针对最新恶意软件变种，杀毒软件的无效性使得紧急更新变得必要。
Frustrated with the inefficacy of the current system, many employees proposed a complete overhaul of the workflow process.
许多员工对当前系统无效感到沮丧，因此提议彻底改革工作流程。
The inefficacy of the peace talks between the two nations was evident from the lack of any tangible progress.
两国之间的和平谈判无效性从缺乏任何实质性进展中可见一斑。
Researchers attributed the inefficacy of the vaccine in some cases to the rapid mutation rate of the virus.
研究人员将疫苗在某些情况下无效归因于病毒的快速突变率。
Investors began withdrawing their funds due to the inefficacy of the management team to turn around the struggling business.
由于管理团队无力扭转困境中的企业，投资者开始撤回资金。