得知事情真相后，他在愤怒与释然之间反复摇摆。
He vacillated between anger and relief when he learned the truth about what had happened.
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解释
vacillate 形容情绪在两种截然不同的感受间快速转换、交替出现。
He vacillated between anger and relief when he learned the truth about what had happened.
vacillate 形容情绪在两种截然不同的感受间快速转换、交替出现。