a sudden and unexpected event or piece of news
意外事件（或消息）
the job came like a bolt from the blue.
得到這份工作是出乎預料的事。
with the back very straight
筆直
she sat bolt upright in bed.
她筆直地坐在床上。
(informal)have done all that is in one's power
(非正式)竭盡全力
try to escape by moving suddenly towards (something)
試圖迅速逃到（某處）
Ellie made a bolt for the door.
艾莉往門口逃去。
A sudden, shocking surprise or turn of events.
晴天霹靂：事件的突發(fā)或突然轉變