Compulsory book
[经] 必需的帐簿
🧩 词语组成解析
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
You're right.
说得对。
He is a doctor. He has his own practice.
他是个医生，他自己开业。
Not at all, smiled Lucy. You're welcome!
“没关系，”露茜笑着说，“不用谢！”