arrive in high spirits and depart after enjoying oneself to one's heart's content; arrive in high spirits and depart well content; 乘兴而来,兴尽而返
improvise a poem while in a joyful mood 乘兴作了一首诗
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)