One definition of biodiversity is the differences of life at all levels of biological organization.

VOA: special.2010.05.25

The chance to talk to patients, and to staff, really at all levels, is one of the most important things that i do.

与病人，和各级员工交谈，是我的重要工作之一。

普林斯顿公开课 - 领导能力简介课程节选

And this can be asked at all sorts of levels but a simple level is what makes for a pretty face?

这可以在很多层面上问及,但一个简单的层面就是什么才是好看

耶鲁公开课 - 心理学导论课程节选

"We need an army of people who are equipped to know how to work at all levels and all scales, from protecting animals in the wild to providing shelter to them in zoological parks if necessary."

VOA: special.2010.06.22

Senator Amy Klobuchar, a Michigan Democrat, said Americans at all levels but notably the middle class continue to struggle.

VOA: standard.2009.12.05

Dr.Newman says the diagnostic test can be performed at all levels of the health system, including community settings.

VOA: standard.2010.03.09

Mullen also said he was impressed by how quickly the new directive on avoiding civilian casualties has been adopted by U.S.troops at all levels.

VOA: standard.2009.07.20

Although we have looked at all levels of the brainstem, the major problems are here."

VOA: standard.2010.02.08

I think we have to use the same techniques that we used effectively against the Mafia here in the United States where you attack these organizations at all levels,"

VOA: standard.2009.10.22

He says getting the book approved was hindered by the fact that most former Khmer Rouge went unpunished and are now found at all levels of Cambodian society and politics.

VOA: standard.2010.04.19

You know,these things happen in all sports at all levels."

VOA: standard.2010.02.15