closed book

  • 中文含义：闭塞的、不透露或无法了解的事情或人
  • 英语词性：idiom
  • 美式音标：[kloʊzd bʊk]
  • 同义词：enigma, mystery, secret
  • 易混淆单词：open book

双语例句

1. Despite their close relationship, his past remains a closed book to her. (尽管他们关系很亲密，但他的过去对她而言是个不可知的谜团。)

2. The company’s financial records are a closed book to outsiders. (公司的财务记录对外人来说封闭不可知。)