| 短语 | rack your brain(s) |
| 释义 | rack your ˈbrain(s)to think very hard or for a long time about sth绞尽脑汁；冥思苦想She racked her brains, trying to remember exactly what she had said.她绞尽脑汁，想要回忆起她到底说过些什么话。 |
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