偶然事件：指发生的结果不是由于计划或安排，而是由于偶然的原因。
偶发事件
随机事件
不确定事件或随机事件(chance event)：无法预先确定在一次实验中会不会发生的事件，我们称它们为不确定事件或随机事件．
偶然事件(chance events)：偶然事件会造成行业 混乱，为新企业的加入创造机会。
... virgule 斜线号(/)（用于分隔替... CVA 脑血管伤害 chance event 不确定结点 ...
...件不是在每次实验中都一定发生，也不是在每次实验中都不会发生，而是有时发生，有时不发生． 不确定事件或随机事件(chance event)：无法预先确定在一次实验中会不会发生的事件，我们称它们为不确定事件或随机事件． 3．必然事件在每次实验中必然会发生，它发生...
A game, usually played for money or stakes, in which the winner is determined by a chance event, as by drawing Numbers or throwing dice.
靠运气定胜负的比赛：一种常为钱或赌注而进行的比赛，比赛中获胜者全靠机会决定，一般采用抽签或掷骰子的方式。
By starting at the end of each of the outcome branches and working backward in time through all the decision and chance event nodes, expected monetary value (EMV) can be calculated for each outcome.
从结果点开始往回推，经过所有决策及不确定事件的节点后，可以计算出每个结果的预期货币值(EMV)。
Visiting an apple event is a good chance to see, and often taste, a wide variety of apples.
参观苹果展是一个很好的机会，你可以欣赏，甚至品尝到各种各样的苹果。
The event,on July sixteenth, was a rare chance for planetary scientists to share with the public the mysteries of Mars.
VOA : special.2010.07.28
Analysts caution that the still influential Communists have a chance to retain the presidency, in any event, because pro-European parties do not have enough votes to choose one of their own.
VOA : standard.2009.08.29
And the book just tells you that, right, in one of those palm"-- the ordinary event which is really trickery, a suggestion ; that nothing has been left to chance in the novel; nothing is ordinary.
这本书也这么告诉大家了，对了，就是在,手里的东西）看似普通的事件实则是个奸计,它是一个提醒，提醒大家这部小说里没有什么事是巧合;,任何事都不普通。
1945年后的美国小说课程节选 : 耶鲁公开课
But a chance event changed her career trajectory.
FORBES: BUILD Taps Silicon Valley To Paint A Brighter Future For Disengaged Youth
But with Ireland at home they have an excellent chance to win the event and then qualify for the West Indies.
This is such a waste , as inside every event is the chance to search for ways we can improve.