symphony; symphonic music; 交响乐
instrumental [vocal] music; 器[声]乐
Yue Yi 乐毅
happy and gay 欢乐
love to do philanthropic work; 乐善好施
enjoy doing sth. without stop; never be bored with sth. 乐此不疲
laugh with amusement; 逗得直乐
What are you laughing at?; What's the joke? 你乐什么呀?
enjoy life; 享乐
amuse oneself 作乐
Le Yi 乐义
not what I would like to hear 非我所乐闻
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)