efficiency是可数名词还是不可数

efficiency 是不可数名词

英 [ ɪˈfɪʃ(ə)nsi ]

美 [ ɪˈfɪʃnsi ]

效率，效能常用释义

释义

n.

效率，效能；（机器的）功率

变形

复数efficiencies

例句

1. She arranged everything with her customary efficiency.

她以她特有的高效率把一切都已安排妥当。

2. It was achieved with minimum fuss and maximum efficiency.

它以最少的慌乱和最高的效率被做到了。

3. Defrost the fridge regularly so that it works at maximum efficiency.

定期给冰箱除霜能取得最大效率。