mirth

n.

欢乐，欢笑；

1. The end of mirth is the beginning of sorrow.
   欢乐是结束就是悲哀的开始。
2. Christmas is a time of mirth, especially for children.
   圣诞节是个快乐的日子，尤其是对孩子们。
3. The announcement was greeted with much hilarity and mirth.
   这一项宣布引起了热烈的欢呼声。
4. When I told them what had happened to me, they all chortled with mirth.
   我把我的事告诉他们以后,他们咯咯地笑起来了。
5. My joke caused a great deal of mirth among the little children.
   我的笑话把小孩子们都逗乐了。

Mirth, laughter and gelastic seizures.
Mirth and laughter arising from human temporal cortex.
A disposition theory of humour and mirth.
FITS OF LAUGHTER (SHAM MIRTH) IN ORGANIC CEREBRAL DISEASE
The physiologic effect of humor, mirth, and laughter
Experiences with Mirth:an open source health care integration engine
The physiologic effects of humor, mirth, and laughter.
AUTONOMIC RESPONSE PATTERNS DURING SADNESS AND MIRTH
Is this joke really funny? judging the mirth by audiovisual laughter analysis
Contralateral Smile and Laughter, but No Mirth, Induced by Electrical Stimulation of the Cingulate Cortex