off-book

形容词 adj.
中文释义

英文释义

形容词 adj.
  1. Able to perform scripted material from memory, without need to refer to the text.
  2. Off the books, not officially recorded.
    — An enormous amount of off-book money sloshes around Chinese business and officialdom, and some of it runs into handbags.

词源

From off- + book.
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