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Push the envelope
勇于创新突破极限
The aircraft's altitude envelope must be expanded to permit a flight across the nation.
飞机需要提高飞行高度才能在国内飞行。
NASA pilots were to push the envelope to ten thousand feet.
美国航天局飞行员将飞行高度增加到了1万英尺。
As a pop icon, Madonna has been pushing the envelope of the mainstream culture since day one．
作为一名流行偶像，麦当娜从出道之日起就一直勇于创新，不断突破主流文化的极限。
Nowadays, parents have a hard time dealing with children who always try to push the envelope and get away with as much as possible.
如今，家长很难管教那些总想突破极限、即使有出格行为也尽可能不被抓到的孩子。
Mom. It's Rachel's birthday today. She's invited me to her party.Can I go?
妈，今天是Rachel生日。她邀请我参加她的派对。我可以去吗？
Sure．
可以。
We'll probably be up all night. Can I stay over?
我们可能要活动整晚。我可以在那里过夜吗？
Don't push it.
别得寸进尺。
