a closed book
常见例句
- Fishing is a closed book to me.
我對釣魚是一竅不通。 - The actress' life is a closed book to us.
那個女縯員的生活對我們來說是個秘密。 - Paul Newman officially announced his retirement from acting in 2007 - "It's pretty much a closed book for me, " he said.
2007年，保羅紐曼正式宣佈息影——“對我來說，這本書已經郃上了”，他說。 - And other classes are completely closed book. You can't bring anything into it, even a calculator, so.
而有些課的考試是完全閉卷考試。考試時什麽都不能帶，甚至計算器都不行。
考試應該這麽準備 - SpeakingMax英語口語達人 - Who can possibly remain a closed book, when others try to open it and leaf through?
NEWYORKER: Hack Work - But diplomats and other foreign observers admit that the army is a closed book to outsiders.
ECONOMIST: By-elections in Myanmar - This election may have closed the book on a Vietnam veteran ever being elected president.
FORBES: Magazine Article 返回 a closed book