1.Some scientists think it came after an unexpected incident when a huge rock from space hit the earth and put too much dust into the air.
有些科学家认为恐龙灭绝是发生在一件意外事故之后，当时宇宙间一块巨石击中地球因而在空气中扬起太多的尘土。
2.I'm afraid the unexpected incident may make them worried.
恐怕这意想不到的事情会使他们担心。
3.The risk is that an unexpected incident could escalate as the hot line goes unanswered.
而这一切的风险在于，当热线无人应答时，一个意外事件可能逐步升级。
4.Classifying method of critical paths in network planning including unexpected incident and its applications
含有突发事件的网络计划关键路线分类与应用
5.Research on the Standpoint, Position and Function of Government When Facing Unexpected Incident
政府在突发性公共事件及其危机中的立场、地位和职能研究
6.The Subjective Game Analysis for the Root of Mass Unexpected Incident
群体性突发事件产生根源的主观博弈分析
7.The Role of Communication in the Mass Unexpected Incident Management
信息交流在群体性突发事件处理中作用的博弈分析