英语词汇“He has to rack his brains to liven the class”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	He has to rack his brains to liven the class
释义	He has to rack his brains to liven the class. 他每天都要绞尽脑汁来调动课堂气氛。
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