点击下方单词,选择对的这个单词
1. 有效/灵验：efficaciously /有效地/灵验地/ | efficaciousness /有效/灵验/ | efficacy /功效/效力/效/
noun
1. capacity or power to produce a desired effect
e.g. concern about the safety and efficacy of the vaccine
Synonym: efficacy
多通过句子记忆单词，而不是单独死记硬背。
