gaiety [ˈgeɪəti]

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n.欢乐；乐事；华丽

happiness and excitement

The colourful flags added to the gaiety of the occasion.彩旗增添了盛会的欢乐气氛。
Her manner professed a gaiety that she did not feel.她的神态显出一种她并未实际感受到的快乐。