Test pilots try to push the envelope.

试飞员尝试挑战极限。

youdao

'It's my job here to push my staff to push the envelope and think about the global automotive future from Beijing.'

我在这里的职责就是敦促手下员工开拓思路，站在北京畅想全球汽车业的未来。

youdao

Did you see what Adam is wearing today? Yeah… Well… He has always liked bright colors. That guy really likes to push the envelope.

你看见阿丹今天穿的什么了吗?是的…额… 他一直以来都喜欢亮的颜色。

youdao

"It's absolutely necessary that we continue to push the envelope in terms of try to develop new innovative and more natural ways of effectively treating arthritis."

VOA: standard.2010.08.11

Brandon Gutman: What is American Express doing in 2011 to push the envelope on customer service?

FORBES: Why American Express Is Raising The Bar On Customer Service

For us to push the envelope of what can be done in Antarctica, that felt good.

BBC: Polar express

With each new film, audience expectations rose as Nolan continued to push the envelope of super hero storytelling.

FORBES: Christopher Nolan Delivers Super Hero Perfection With The Dark Knight Rises