Coefficient of performance(cop)
[化] 性能系数; 效率
🧩 词语组成解析
coefficient
[,koɪ'fɪʃnt]
n. 系数;（测定某种质量或变化过程的）率;程度;协同因素;
adj. 共同作用的;合作的;
co共同+ef出+fici做+ent...的 → co共同+efficient做出来=有效的 → 一起有效的 → 系数
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
Thank you.
谢谢 。
I should not hesitate a moment to prefer the latter.
我会毫不犹豫地选择后者。
Fortunately, the shouting woke up my wife who opened the window just as the policeman had started to climb towards me.
幸运得很，这喊声惊醒了我的妻子。就在警察开始向我爬上来时，她打开了窗子。