[] ( contingencies) an event that you hope will not happen, but for which you plan in case it does偶发事件；偶然事故◆We must consider all possible contingencies.我们必须考虑所有可能出现的突发事件。●on a conˈtingency basisif you provide services to sb/sth on a contingency basis, you are only paid if your services help them to achieve a particular aim, for example, winning money in a court case“无效果，无报酬”原则◆Personal injury lawyers will often work on a contingency basis.律师经常依照“无效果，无报酬”原则处理人身伤害案件。