emergency
/ɪˈmɜ:dʒənsɪ; ɪ`mədʒənsɪ/ n
1 [C, U] sudden serious event or situation requiring immediate action 紧急事件; 紧急情况
You should only use this door in an emergency. 在紧急情况下才能使用这扇门.
The government has declared a state of emergency, eg because of war, a natural disaster, etc. 政府已宣布进入紧急状态.
[attrib 作定语]
the emergency exit 紧急出口.
2 [U] (US) = casualty 3: [attrib 作定语]
the emergency ward 急诊病室.