Cool MateEffectiveness 对比 Efficacy
在英语中何时使用每一个，包含含义、语域和例句。
Effectiveness
前 2000（常见）C1noun
Efficacy
正式10000 以上（较少见）
最正式: Efficacy最常见: Effectiveness
| Effectiveness | Efficacy | |
|---|---|---|
| 发音 | 🇬🇧 /["/ɪˈfektɪvnəs/","/ɪˌfekˈtɪvəti/"]/🇺🇸 /["/ɪˈfektɪvnəs/","/ɪˌfekˈtɪvəti/"]/ | 🇬🇧 //ˈɛfɪkəsi//🇺🇸 //ˈɛfɪkəsi// |
| 含义 | How well something works or succeeds. | Effectiveness or how well something works. |
| 例句 | to check the effectiveness of the security system | The efficacy of the new vaccine was confirmed in clinical trials. |
| 语域 | 中性 | 正式 |
| 常见程度 | 前 2000（常见） | 10000 以上（较少见） |
| CEFR 等级 | C1 | - |
| 词性 | noun | |
| 搭配 | measure effectiveness, assess effectiveness, improve effectiveness, evaluate effectiveness | clinical efficacy, evaluate efficacy, prove efficacy, demonstrate efficacy, measure efficacy |
| 反义 | ineffectiveness, failure | - |
| 常见错误 | Confused with 'effect' — remember 'effect' is a noun meaning the result., Using 'effectiveness' when discussing personal feelings — it's more about objective results., Mispronouncing the word, often stressing the wrong syllable. | Confused with 'efficiency', which refers to doing things quickly and without waste., Often used without proper context; needs to specify what is being evaluated., Mispronounced, especially by non-native speakers. |
| 用法说明 | Used in both formal and informal contexts, often in discussions of strategies, programs, or methods. Avoid using in overly casual conversations. | Used primarily in formal contexts like research, medicine, and discussions about policy. Less common in everyday conversation. |
常见问题：Effectiveness 对比 Efficacy
Effectiveness和Efficacy 有什么区别？
Effectiveness: How well something works or succeeds. Efficacy: Effectiveness or how well something works.
哪个更正式：Effectiveness和Efficacy？
Efficacy 是其中最正式的。
哪个更常见：Effectiveness和Efficacy？
Effectiveness 在日常英语中最常见。
能各给一个例子吗？
Effectiveness: to check the effectiveness of the security system Efficacy: The efficacy of the new vaccine was confirmed in clinical trials.
我可以互换使用 Effectiveness和Efficacy 吗？
不总是。Effectiveness和Efficacy 相关，有时可以互换，但在语域、常见程度和用法上不同，所以换用可能改变意思或语气。替换前先看看上面的区别。