push the envelope
突破界限;挑戰極限
口語·形容創新或冒險
英文釋義
to go beyond the usual limits or boundaries; to take risks or be innovative in order to achieve a desired outcome
例句
The designer pushed the envelope with that futuristic dress, but everyone loved it.
典故來源
源于航空術語,指飛行員測試飛機性能極限,后泛指突破常規或挑戰界限。