the unexpected accident 意想不到的事故
unexpected public accident 突发性公共事件
unexpected hijacking accident 突发性劫持事件
An unexpected tire burst accident 一次意外的爆胎事故
With the help of local residents, the taxi driver fortunately escaped from the car without any injuries, but was in shock from the unexpected accident.
在当地居民的帮助下，出租车司机幸运地从车里逃出。虽然他没有受伤，但被这突如其来的意外事故惊呆了。
The formula can be used to predict quantitatively the extent of soil deformation in order to avoid any unexpected accident.
运用该公式可定量预估挤土程度，防止意外事故的发生。
I'm afraid the unexpected accident may botch up the dinner today.
恐怕这意想不到的事故会把今天的晚宴搞糟。
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