效能

efficient

efficiency

effectiveness

available energy

effectivity

potence

efficacy

potency

amount of effect

feck

效能[xiàonéng]

-potency;efficacy;usefulness;effect;efficiency:
makethebestpossibleuseofirrigation;makefulluseofirrigation充分发挥灌溉效能

效能有功效的特征或性质
The quality or property of being efficient.

无污染燃油；无污染、效能更高的引擎
A clean fuel; a cleaner, more efficient engine.

阿司匹林有解除头痛的效能。
Aspirin has efficacy in relieving headaches.