嗯，问一个关于英语的问题。请问bad dream和nightmare有什么区别

Bad Dreams, Nightmares, and Night Terrors: Know the Difference

bad dream is very general. A bad dream only makes you feel bad for a short period of time.any dream you dont like or enjoy is a bad dream.一个不好的梦是普通的做梦而已，是你不喜欢的和不享受的，只会让你在短时间内有不好的感觉的梦。?

A nightmare is usually a scary dream, like a horror film ，nightmare can trouble you for months or even years. ?噩梦会经常做的梦，让你惊恐，像恐怖片一样，噩梦会困扰你数月甚至数年之久。