uncertaintyn.不确定；不可靠；易变Uncertainty Knowledge Degree不确定性知识程度uncertainty of energy measure能量测不准uncertainty value of quantity不确定度uncertainty management system不确定管理系统uncertainty membership degree不确定性隶属度uncertainty of exchange rates汇兑行市的不稳定性； 外汇波动uncertainty accounting events不确定性经济业务uncertainty of energy demands负荷不确定性uncertainty measurement theory未确知测度理论uncertainty knowledge reasoning不精确知识推理