The result of these experiments will be a nightmarish world filled with two-headed monsters and other mutants.这些实验的结果是一个噩梦般的世界，到处是双头怪和其他可怕的东西。The refugees had survived a living nightmare.难民们熬过了噩梦般的痛苦经历。The writer evokes a nightmare vision of a future on a polluted planet.作者描画了未来遭受污染的星球上噩梦般的场景。