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
Uh-hum.
嗯哼。
Do you want to change before the banquet?
宴会前你想换衣服吗？
After her husband had gone to work.
理查兹夫人等丈夫上班走后，