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词汇 be a closed book (to sb)
释义
idiombe a closed book (to sb) BrEBrEused in order to say that someone does not understand something:They're not much good at adding and subtracting, and as for multiplication, it's a closed book.The complications of office politics were a closed book to Janice.
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更新时间:2026/10/19 14:12:23