ebullient [ɪˈbʌliənt]

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adj.兴高采烈的，奔放的

very energetic , positive and happy

He was ebullient over the reception of his novel. 他因小说获好评而兴高采烈。
She wrote the ebullient letter when she got back to her flat. 她一回到自己的寓所，就写了那封热情洋溢的信。