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1. Oxford Dictionary

   rack one's brain

   • ph.
     make a great effort to think of or remember something
2. • 相關詞

   rack (or wrack) one's brains (or brain)

   • ph.
     make a great effort to think of or remember something

   Oxford American Dictionary

   rack (or wrack) one's brains (or brain)

   • ph.
     make a great effort to think of or remember something

   Oxford Dictionary

3. • 更多解釋

   rack one's brain

   • ph.
     make a great effort to think of or remember something

   Oxford American Dictionary