Efficiency variance
[經] 效率差異
?? 詞語組成解析
variance
['v??ri?ns]
n. 變化，變動;不一致;分歧;<數>方差;
??? 情景例句
No, nothing.
沒有，沒什么。
Americans wonder what has become of the idealism of the last decade.
美國人的理想主義，不知道在這十年間變得怎樣了。
There's something wrong with my left shoulder. I hurt it while I was doing gym. I've got a pain here too.
我的左肩疼痛。我做體操時受傷了。這里也疼。