Closed book
n. 一无所知的东西; 已结束的事（计划、行动等）
🧩 词语组成解析
closed
[klozd]
adj. 关闭着的，封闭着的;密闭着的，保密的;<美>准备好了的，定了契约的;
v. “close”的过去式和过去分词;
clos=close关闭+ed已...的→关闭了的
book
[bʊk]
n. 书;卷;课本;账簿;
vt.& vi. 预订;
vt. 登记;（向旅馆、饭店、戏院等）预约;立案（控告某人）;订立演出契约;
adj. 书的;账簿上的;得之（或来自）书本的;按照（或依据）书本的;
🗣️ 情景例句
Have you been here to see Dr. Tyler before?
你曾来过泰勒医务所看过医生吗？
I go out for lunch at about 12:30.
我在大约12:30去外面吃午餐。
and it seemed as though everything she possessed had been tossed out and turned over and over.
看来她的每一件东西都被翻了出来，并且被里里外外看了遍。