deus ex machina
noun /ˌdeɪʊs eks ˈmækɪnə/
/ˌdeɪʊs eks ˈmækɪnə/
[singular] (literary)- an unexpected power or event that saves a situation that seems without hope, especially in a play or novel
（尤指剧本或小说中）机械降神，扭转乾坤的力量 词源late 17th cent.: modern Latin, translation of Greek theos ek mēkhanēs, ‘god from the machinery’. In Greek theatre, actors representing gods were suspended above the stage, the denouement of the play being brought about by their intervention.