词汇	视力不足
释义	视力不足医visual debility
随便看	Variation,Antigenic variation area Variation assimilation variation asthma variation beam variation before earthquakes variation between classes variation between groups variation between laboratories variation calculus variation call variation center Variation change variation character variation characteristic variationcharacteristics variation characteristics variation chart Variation,Clinical Practice variation coefficient variation coefficient for discharging voltage variation coefficient index variation coefficient method variation coefficient of orebody thickness variation coefficients