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

It has not worked several times, "Ricks reminded Greene."

几次都没有奏效。

youdao

That has not worked. It is hard to regulate the actions of billions of people.

其中一些国家已尝试控制每户孩子的数量，但这并不起作用，计划数十亿的人口太困难。

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