6.绞尽脑汁 to rack one's brain
他已经绞尽脑汁了,可是仍未找到问题的答案。
He had racked his brain, but hadn't been able to work out the answer to the problem.
n. 刻痕,等级,峡谷 vt. 刻凹痕,用刻痕计算,计分
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6.绞尽脑汁 to rack one's brain
他已经绞尽脑汁了,可是仍未找到问题的答案。
He had racked his brain, but hadn't been able to work out the answer to the problem.