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
What was that?
会是什么呢？
Hello, it's really great to talk about ourselves and get to know each other.
大家好，我们自我介绍并相互认识真是太好了。
The prisoner felt sorry for him, but there was nothing else he could do.
战俘为他感到惋惜，但却没有别的选择。