单词学习：effectiveness 名词
effectiveness
/ɪˈfektɪvnəs/
有效性；效力；效果
The effectiveness of Mr. Gu's teaching methods has been proven by the significant improvement in his students' test scores.
顾老师教学方法的有效性已被学生考试成绩的显著提高所证明。
单词卡片
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