pushed the envelope
竭尽所能
Slang 
 

  (来源：英语麦当劳－英语学习门户 EnglishCN.com)

Quote
“I’ve pushed the envelope.”
Michael Jordan, in an interview with CBS News. (来源：EnglishCN英语博客基地)

Meaning
to go further or do better than anyone else; to go to the limit when doing something; to stretch something; to challenge what is normal

(来源：最老牌的英语学习网站 EnglishCN.com)

Use
Michael Jordan is one of the greatest basketball players of all time. He pushed the envelope in the NBA, doing things that no other player had done before.
To push the envelope means you are trying to do better, run faster, hit harder, think smarter than everyone else. If you push the envelope, you are trying to change ideas and redefine the way people think about something. (来源：英语图片 http://photo.englishcn.com)

Examples
“If you want to be the best, you have to push the envelope.”