Word · Frequency #9115
efficacy
功效；效力；有效性
核心释义
the ability to produce a desired effect; effectiveness
- 1.
在理想测试条件下产生预期效果的能力。
The ability to produce a desired effect under ideal testing conditions.
- 2.
产生预期效果的能力或效力
capacity or power to produce a desired effect
- 3.
产生预期效果的能力程度；有效性。
A degree of ability to produce a desired effect; effectiveness.
在理想测试条件下产生预期效果的能力。；产生预期效果的能力或效力；产生预期效果的能力程度；有效性。；功效；效力；[医] 效能
用法In use
The efficacy of the new study method was clear from the test results.
用法提示：efficacy在此为名词，表示‘功效、效力’，作句子的主语。
We need more evidence to prove the efficacy of this approach.
用法提示：efficacy在此为名词，表示‘有效性’，作prove的宾语。
The training program's efficacy impressed the managers.
用法提示：efficacy在此为名词，表示‘成效、效力’，与所有格program's搭配使用。
concern about the safety and efficacy of the vaccine
the efficacy of [noun]
表示某事物的功效，最基础的结构。
The efficacy of the new drug has been confirmed.
这种新药的功效已被证实。
相关词与表达Connections
搭配Collocations
- clinical efficacy
- 临床疗效
- The clinical efficacy of the new drug was confirmed in the trial.新药的临床疗效在试验中得到了证实。
- prove efficacy
- 证明功效
- Further studies are needed to prove the efficacy of this treatment.需要进一步研究来证明这种治疗方法的功效。
- efficacy of treatment
- 治疗效果
- The efficacy of treatment varies from patient to patient.治疗效果因人而异。
- evaluate efficacy
- 评估效力
- Researchers are conducting a study to evaluate the efficacy of the vaccine.研究人员正在进行一项研究以评估疫苗的效力。
- demonstrate efficacy
学习提示Learner notes
记忆技巧Memory Tip
联想'efficacy' = 'eff'（努力） + 'icacy'（像capability），努力+能力=功效。
语境与语域Context & Register
语域：formal 常见场景：medicine、research 通常用于正式或专业语境，如医学、科研等领域，表示某物产生预期效果的能力。
语法说明Grammar Note
通常作不可数名词；表示不同种类或具体效力时可用复数 efficacies。
发音与拼写Pronunciation & Spelling
No perfect rhymes. The listed words share the '-acy' ending but differ in stressed vowel or stress placement; only 'legacy' has a similar initial /ɛ/ vowel but with different following consonants.
用法优先级Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
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Dictionary facts from ECDICT, WIKTIONARY.