efficacy

efficacy的音标是[ɪ"fɪkəsɪ]，基本翻译是效能、功效。

速记技巧是：可以结合上下文，将单词拆分记忆，注意连读和音节划分。

Efficacy这个词的词源可以追溯到拉丁语词根“eficere”，意为“执行，实施”，加上词缀“facere”的变体，表示“做”。这个词在英语中表示“效果，效力”。

变化形式：在英语中，efficacy的变化形式包括其名词形式和形容词形式。名词形式包括efficacy和efficaciousness，形容词形式包括efficacious和inefficacious。

相关单词：

1. Efficacy - 名词形式，表示效果或效力。例如，“the efficacy of a drug”可以表示药物的效力。

2. Efficaciousness - 名词形式，表示效力的性质或状态。例如，“an efficacious treatment”可以表示一种有效的治疗方法。

3. Efficacious - 形容词形式，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师。

4. Inefficacy - 反义词，表示无效或无效果。例如，“inefficacious measures”可以表示无效的措施。

5. Inefficacious - 形容词形式，表示无效的或不产生效果的。例如，“ineffective strategies”可以表示无效的战略或计划。

6. Efficient - 形容词形式，表示有效率的或能产生预期效果的。例如，“efficient leadership”可以表示高效率的领导。

7. Effectiveness - 名词形式，表示效果或效率的程度。例如，“the effectiveness of advertising”可以表示广告的效果。

8. Effective - 形容词形式，表示产生预期效果的或有效的。例如，“effective strategies”可以表示有效的战略或方法。

9. Efficency - 名词形式，表示效率或效果的产生过程或方式。例如，“efficency analysis”可以用于分析如何提高效率或效果。

10. Efficiently - 副词形式，常用于描述行为或过程的有效性或效率。例如，“they work efficiently”可以表示他们工作得有效率。

常用短语：

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.