If the scientist has not worked hard to develop his knowledge and skills, he may not recognize that lucky breakthrough when it comes along.

如果科学家没有努力提升他的知识和技能，当幸运的突破来临之时他可能会意识不到。

youdao

The forum will facilitate an analysis of what works, of what has not worked and why, and of how to accelerate progress.

论坛将促进分析哪些对策有效，哪些对策无效，原因何在，以及如何加速进展。

youdao

Mark Doyle, who's reported from Africa for many years, looks at why aid is necessary, and why much of what's been donated in the past has not worked.

马克·多伊勒是一位在非洲工作了多年的记者。他将会探讨为什么一定要给非洲援助，以及为什么以前给予非洲的大部分援助都没有起到作用。

youdao

And this traditional business model has not worked very well on the Internet, especially not in a bad economy.

VOA: special.2009.04.20

Oh, I have worked on a couple of projects where the other person has not done much work.

哦，我参加过几个项目中而组员不怎么干活。

怎么协调意见冲突 - SpeakingMax英语口语达人

"The policy we have had in place for 50 years has not worked the way we wanted it to,"

VOA: standard.2009.04.19

We're also trying to determine what has not worked and how we can correct it.

FORBES: U.S. Sen. Michael Enzi

He has not worked since and has filed a multimillion-dollar lawsuit against the city.

CNN: Jury in police torture case begins third day of deliberations

Many people, including the man who designed it, Mal Brough, say it has not worked.

ECONOMIST: A distinct society, perhaps becoming less so