efficacy的音標(biāo)是[?"f?k?s?]，基本翻譯是效能、功效。

速記技巧是：可以結(jié)合上下文，將單詞拆分記憶，注意連讀和音節(jié)劃分。

Efficacy這個(gè)詞的詞源可以追溯到拉丁語(yǔ)詞根“eficere”，意為“執(zhí)行，實(shí)施”，加上詞綴“facere”的變體，表示“做”。這個(gè)詞在英語(yǔ)中表示“效果，效力”。

變化形式：在英語(yǔ)中，efficacy的變化形式包括其名詞形式和形容詞形式。名詞形式包括efficacy和efficaciousness，形容詞形式包括efficacious和inefficacious。

相關(guān)單詞：

1. Efficacy - 名詞形式，表示效果或效力。例如，“the efficacy of a drug”可以表示藥物的效力。

2. Efficaciousness - 名詞形式，表示效力的性質(zhì)或狀態(tài)。例如，“an efficacious treatment”可以表示一種有效的治療方法。

3. Efficacious - 形容詞形式，表示有成效的，有效的。例如，“an efficacious teacher”可以表示一位有成效的教師。

4. Inefficacy - 反義詞，表示無效或無效果。例如，“inefficacious measures”可以表示無效的措施。

5. Inefficacious - 形容詞形式，表示無效的或不產(chǎn)生效果的。例如，“ineffective strategies”可以表示無效的戰(zhàn)略或計(jì)劃。

6. Efficient - 形容詞形式，表示有效率的或能產(chǎn)生預(yù)期效果的。例如，“efficient leadership”可以表示高效率的領(lǐng)導(dǎo)。

7. Effectiveness - 名詞形式，表示效果或效率的程度。例如，“the effectiveness of advertising”可以表示廣告的效果。

8. Effective - 形容詞形式，表示產(chǎn)生預(yù)期效果的或有效的。例如，“effective strategies”可以表示有效的戰(zhàn)略或方法。

9. Efficency - 名詞形式，表示效率或效果的產(chǎn)生過程或方式。例如，“efficency analysis”可以用于分析如何提高效率或效果。

10. Efficiently - 副詞形式，常用于描述行為或過程的有效性或效率。例如，“they work efficiently”可以表示他們工作得有效率。

常用短語(yǔ)：

1. efficacy in medicine

2. efficacy of treatment

3. therapeutic efficacy

4. clinical efficacy

5. efficacy of drug

6. efficacy of surgery

7. efficacy of vaccination

例句：

1. The efficacy of this medicine has been proved by clinical trials.

2. The treatment showed good efficacy in relieving the patient"s symptoms.

3. The therapeutic efficacy of the drug was demonstrated by its ability to reduce the incidence of disease.

4. The surgery has been shown to have a high clinical efficacy in treating this condition.

5. The drug showed good efficacy in reducing the symptoms of the patient with the disease.

6. The vaccination has been shown to be highly effective in preventing the spread of the virus.

英文小作文：

The Importance of Efficacy in Medicine

When choosing a medicine, it is essential to consider its efficacy, which is the measure of how well it performs in relieving symptoms or preventing disease. Efficacy is crucial because it determines whether a medicine is effective in treating a patient"s condition and whether it is worth taking.

In addition to efficacy, safety and tolerability are also important factors to consider when choosing a medicine. However, efficacy is the primary criterion because it directly affects the patient"s health and well-being. If a medicine is not effective, it may not be able to provide the desired benefits to the patient and may even worsen their condition.

Therefore, it is essential for doctors and patients to carefully evaluate the efficacy of a medicine before making a decision on whether or not to use it. This ensures that patients receive the best possible treatment and achieve the desired outcomes.