backroom
noun [ C ] uk/ˌbækˈruːm/ /ˌbækˈrʊm/ us/ˌbækˈruːm/ /ˌbækˈrʊm/
里屋；密室
a room in which work or other activities are done out of public view or secretly
backroom staff 亲信
backroom negotiations 秘密谈判
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