a frightening or unpleasant dream
噩梦
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I had nightmares after watching the horror movie .我看完这部恐怖片后做了许多噩梦。
a terrifying or very unpleasant experience or prospect
恐怖的经历;可怕的事情
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the nightmare of racial hatred 种族仇恨的可怕经历
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an astronaut's worst nightmare is getting detached during an extra-vehicle activity .宇航员最怕的事情就是在舱外活动时与宇宙飞船分离。
a person, thing, or situation that is very difficult to deal with
很难对付的人(或事、情况等)
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buying wine can be a nightmare if you don't know enough about it .如果你对酒知之甚少的话,买酒将会是很难对付的事情。
"Middle English (denoting a female evil spirit thought to lie upon and suffocate sleepers): from