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

1.
突破極限, 創新
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.
這家公司總是試圖用其新技術來突破極限。
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Artists who push the envelope often face criticism before their work is accepted.
突破極限的藝術家在他們的作品被接受之前常常面臨批評。