extreme amusement, especially when expressed by laughter
(尤指由笑声表达的)极度快乐
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his incredulous expression was the cause of much hilarity. 他那怀疑的神情引人大笑。
boisterous merriment
欢闹,狂欢
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the noisy hilarity of the streets. 街上的狂欢。
"late Middle English (in the sense ‘cheerfulness’): from French