fall-off test压降试井
capacity fall-off电容量减退
fall-off resistance跌落电阻
fall-off voltage跌落电压
isodose fall-off等剂量下降;剂量跌
Light fall-off边角失光
capacitance fall-off电容量衰减
fall-off well压降试井
fall-off curve压降曲线
N-COUNT（可数名词） A fall-off in something such as sales or orders is a decrease in them. 减少 [usu sing]
A surge in domestic sales helped compensate for a fall-off in export sales.
国内销售的增长帮助补偿了出口销售的减少。