[xiào lì]
(效劳) render a service to; serve
(事物所产生的有利作用) potence; effect; efficacy
									
										The drug has lost its potence by being exposed to moisture.
										这药因受潮失去了效力。
									
									(约束力) force; effect; avail
									
										Both texts are equally authentic.
										两种文本具有同等效力。
									
									efficiency; efficacy; effectiveness; vigour; muscle; function