push the envelope
US /pʊʃ ðə ˈɛnvəˌloʊp/
UK /pʊʃ ðə ˈɛnvəˌloʊp/

1.
突破极限, 创新
to go beyond the usual or accepted limits; to innovate or experiment with new ideas
:
•
The company is always trying to push the envelope with its new technology.
这家公司总是试图用其新技术来突破极限。
•
Artists who push the envelope often face criticism before their work is accepted.
突破极限的艺术家在他们的作品被接受之前常常面临批评。