Effectiveness variance
[经] 有效性的差异
🧩 词语组成解析
effectiveness
[i'fektivnis]
n. 有效，有力;有效性;效益;效用;
variance
['vɛəriəns]
n. 变化，变动;不一致;分歧;<数>方差;
🗣️ 情景例句
Michelle and her friends are at the aquarium in Brooklyn.
Michelle和她的朋友们在参观 Brooklyn的水族馆。
Fortune knocks once at least at every man's door.
人人都有鸿运高照之日。
Come and have something to drink.
来喝点什么。