Efficiency variance
[经] 效率差异
🧩 词语组成解析
variance
['vɛəriəns]
n. 变化，变动;不一致;分歧;<数>方差;
🗣️ 情景例句
When was the last time?
最近一次是什么时候？
I hope I didn't offend you.
希望没有冒犯你。
The secretary told me that Mr.Harmsworth would see me.
秘书告诉我说哈姆斯沃斯先生要见我。