Book-off逛二手书店
Book off the ground书掉在地上
book off sick不肯上班
Book Off-Line Scrap in CMS记录离线产品报废
off-book schemes账外项目
off-book account小金库;详细翻译
off the book loan账外借款
off-book fund账外资金
strike off a book当场画
V（动词） to take a period of absence from work due to illness 病休 [Canadian]