hallucination
noun [ C or U ] uk/həˌluː.sɪˈneɪ.ʃən/ us/həˌluː.səˈneɪ.ʃən/
幻觉
an experience in which you see, hear, feel, or smell something that does not exist, usually because you are ill or have taken a drug
A high temperature can cause hallucinations. 高温可使人产生幻觉。
auditory/olfactory hallucinations 幻听／幻嗅