mirth       
noun [ U ]  literary uk/mɜːθ/ us/mɝːθ/
 欢笑;欢乐,高兴
laughter, humour, or happiness
  Her impersonations of our teachers were a source of considerable mirth. 她对老师们的模仿给大家带来了莫大的欢乐。 
 Synonyms: gleehilarity
 
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