efficacy

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英 { "us": "", "uk": "" }
数据源: ai_enrichment
efficacy指某物(如药物、方法、政策)产生预期效果的能力或有效性,常用于正式或专业语境。

用法要点

句型搭配

efficacy常与动词如demonstrate、prove、assess等连用,表示展示或评估有效性;也用于介词短语如in terms of efficacy或with high efficacy。

• demonstrate the efficacy of
• prove the efficacy
• assess the efficacy

介词用法

efficacy后常接介词of,表示某物的功效;也可用in表示在某个方面的效力,但较少见。

• efficacy of the treatment
• efficacy in reducing symptoms
• efficacy against viruses

语域说明

efficacy是正式用词,多用于医学、科学、商业等专业领域;日常口语中更常用effectiveness或efficiency。

• clinical efficacy
• efficacy studies
• marketing efficacy

基础例句

The new medicine has shown good efficacy in treating colds.

这种新药在治疗感冒方面显示出良好功效。

We need to test the efficacy of this cleaning product.

我们需要测试这款清洁产品的效力。

Her teaching methods have proven efficacy with students.

她的教学方法在学生中已被证明有效。

高级例句

The clinical trial demonstrated the vaccine's high efficacy against the virus.

临床试验证明了该疫苗对病毒的高效性。

Researchers are assessing the long-term efficacy of the new policy on economic growth.

研究人员正在评估新政策对经济增长的长期效力。

The company's marketing strategy lacked efficacy in reaching the target audience.

公司的营销策略在触及目标受众方面缺乏效果。

高频搭配

verb

demonstrate efficacyprove efficacyassess efficacyevaluate efficacyenhance efficacy

adjective

clinical efficacyhigh efficacyproven efficacylimited efficacytherapeutic efficacy

noun

drug efficacyvaccine efficacytreatment efficacypolicy efficacyefficacy rate

adverb

highly efficaciousclinically efficaciousproven efficacious

preposition

efficacy ofefficacy inefficacy against

phrase

in terms of efficacywith proven efficacyefficacy and safety

常见错误

❌ 错误:The efficacy of the machine is very high.
✓ 正确:The efficiency of the machine is very high.

efficacy强调产生预期效果的能力,多用于药物、方法等;efficiency指效率或性能,更适合描述机器。这里应用efficiency。

❌ 错误:I efficacy this method.
✓ 正确:I find this method efficacious.

efficacy是名词,不能直接作动词用。应使用形容词efficacious或动词短语如find efficacious。

近义词辨析

effectiveness

effectiveness更通用,指产生效果的程度,可用于日常或正式语境;efficacy更正式,强调内在能力或科学验证的有效性,多用于专业领域。

The effectiveness of the campaign was clear (通用); The drug's efficacy was confirmed in trials (专业)。

efficiency

efficiency指效率或资源利用的最优化,常与时间、成本相关;efficacy关注是否能达到预期目标,不涉及资源消耗。

The engine's efficiency saves fuel (效率); The treatment's efficacy cures the disease (功效)。