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由于快乐而忘记了忧愁。形容非常快乐。
[seek pleasure in order to free oneself from care; be contented to dissipate sorrows] 快乐得忘记了忧愁 其为人也,发愤忘食,乐以忘忧,不知老之将至云尔。——《论语·述而》