乐此不倦

Explanation: This: this. Something for love rather than feeling tired dry. Describe a particular interest in something which the immersion. 　　Source: "Han Ji Guangwu": "I own this music, not to exhaust yourself." 　　Examples: One is to teach people interested in the career, one is interested, for no matter what happens, ~ the. (Lu Xun "lace Literature Anpinyuedao Act")