An ageing nuclear reactor is an accident waiting to happen.
老化的核反应堆早晚会出事故。
结果, 发作用
, 恰
: happened, happening, happens 
是；恰是；偶然发
An ageing nuclear reactor is an accident waiting to happen.
老化的核反应堆早晚会出事故。
What happened to that woman in afterlife?
那女人后半的活怎样？
I thought it right to apprise Chris of what had happened.
我觉得应该告诉克里斯发了什么事。
The climax of the book happens in Egypt.
该故事的高潮发
及。
The child at the back craned forward to see what was happening.
后面的孩子探出头看看出了什么事。
He told me briefly what had happened.
他扼要地告诉我所发的事情。
The accident happened on the southbound carriageway of the M1.
车祸发M1公路的南行车道上。
This happened in the center of operations.
这事发演习的过程中。
Let me digress for a moment and explain what had happened previously.
让我岔开一会儿,解释原先发了什么。
There is no fear of that happening.
那事绝不可能发。
There’s been a lot of toing and froing next door today. I wonder what’s happening.
今天隔壁不停地来回折腾，不知道发了什么事。
Her words brought home the enormity of what was happening.
她的话让人意识到所发事情的严重性。
Memories lie behind of all that has happened.
大家都记得以前发过的事情。
A TV playback showed exactly what had happened.
电视播放的录像原样显示了所发的事。
He jogged out to see what happened.
他慢吞吞地走出去看外边发了什么事。
Despite everything that happened in the interim, they remained good friends.
尽管此间发了许多事，他们一直是好朋友。
Something must have happened to her. She has been sitting there musing for hours.
"她一定是有什么事了,一连几小
坐那里沉思默想。"
We happened to be in the neighbourhood.
我们恰好是邻居。
It so happens that I know the man.
碰我认识那个人。
The story happened on that particular day.
故事就发那一天。
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