1
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。
功效；效力；有效性
先理解核心含义，再看它在真实句子里的用法。
功效；效力；有效性
the ability to produce a desired effect; effectiveness
The efficacy of the new drug has been confirmed.
这种新药的功效已被证实。
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.
产生预期效果的能力或效力
capacity or power to produce a desired effect
产生预期效果的能力程度；有效性。
A degree of ability to produce a desired effect; effectiveness.
The efficacy of the new study method was clear from the test results.
新学习方法的功效从测试结果中显而易见。
AI contextual example
We need more evidence to prove the efficacy of this approach.
我们需要更多证据来证明这种方法的有效性。
AI contextual example
The training program's efficacy impressed the managers.
培训项目的成效给经理们留下了深刻印象。
AI contextual example
concern about the safety and efficacy of the vaccine
对疫苗安全性和有效性的担忧。
WordNet
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。
与动词搭配，强调证明功效。
Clinical trials demonstrated the efficacy of the treatment.
临床试验证明了该疗法的功效。
可用形容词修饰，如 high, low, proven。
The vaccine showed high efficacy in preventing infection.
该疫苗在预防感染方面显示出高效力。
后接领域或情境，表示在某方面的功效。
We must assess its efficacy in real-world conditions.
我们必须评估它在实际条件下的功效。
Not this
This is an efficacy medicine.
Use this
This is an efficacious medicine.
错误地将名词'efficacy'用作形容词。'efficacy'是名词，表示'功效'；形容词形式是'efficacious'，表示'有效的'。
Not this
We measured the efficacy on the new drug.
Use this
We measured the efficacy of the new drug.
介词使用错误。表示'...的功效'时，应使用介词of，而不是on。中文的'对...的功效'易导致误用on。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
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。
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。
治疗效果
The efficacy of treatment varies from patient to patient.
治疗效果因人而异。
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。
展示效能
The drug demonstrated significant efficacy in reducing symptoms.
该药物在减轻症状方面展示了显著的效能。
治疗功效
The therapeutic efficacy of the compound has been well documented.
该化合物的治疗功效已有充分记载。
Use efficacy naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想'efficacy' = 'eff'（努力） + 'icacy'（像capability），努力+能力=功效。
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。
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。
Dictionary facts from ECDICT, WIKTIONARY.