Her husband's behaviour to others was unpredictably violent.她丈夫对待他人的粗暴行为难以捉摸。Monthly costs can rise or fall unpredictably.每月的花费不可预测，有可能增加也有可能减少。Illness can cause people to behave unpredictably.疾病能使人行为乖谬难测。The alloy behaved unpredictably under intense heat.那种合金在高热下的反应无法预测。