efficacy
🇺🇸
/ˈefɪkəsi/
🇬🇧
/ˈefɪkəsi/
noun
R
how well something works in producing a desired effect
Researchers are studying the efficacy of the new drug to ensure it is both safe and effective.
研究者正在研究这种新药的效力，以确保它既安全又有效。
translation
功效
词形变化
Plural
efficacies