An uncertain event or set of events that, should it occur, will have an effect on the achievement of objectives.

一种或一系列不确定的事件，当它发生了，将会影响目标的实现。

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Each path from a chance node (uncertain event) is given a weight representing the probability of outcome listed on that path to occur.

每个机会节点（不确定事件）都被赋予一定比重，比重代表事件结果发生的可能性。

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Project risk is an uncertain event or condition that, if it occurs, has a positive or negative effect on at least one project objective.

项目风险是一旦发生至少会积极或消极影响一个项目目标的不确定事件或条件。

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Mainstream analysts may not want to research such an uncertain event when they can get more eyeballs to read a report on Microsoft ( MSFT), for instance.

FORBES: Motorola, Apple And A Touch Of Schadenfreude

While there is no doubt Littleton was profoundly affected by Martha Moxley's murder and its subsequent investigation, to what end his problems can be attributed to this event is uncertain.

CNN: Moxley Case: Excerpts from the Sutton Report

Organisers said the future of the event was uncertain.

BBC: Brampton Live folk festival cancelled