Because there are nitty-gritty issues to solve, and the people are concentrating on those nitty gritty issues.

VOA: standard.2009.11.01

If we think of the size of a typical atom, we would say that would be about 10 to the negative 10 meters. So, we can see the diameter of a nucleus is absolutely smaller really concentrating that mass into a very small space.

一个普通细胞的大小，抱歉，我和细胞核搞混了0,如果我们考虑，一个普通原子的大小,这大概是10的负十次方米,所以原子核的直径确实非常小,真的是把质量。

麻省理工公开课 - 化学原理课程节选

but I think I'm going to be, um, I'm double concentrating in economics and religious studies.

不过我想我该做出选择了，目前我在学习的是经济和宗教方面的内容。

想学习宗教学 - SpeakingMax英语口语达人

"In this period we are concentrating on the rescue and providing basic necessities for the victims,".

VOA: standard.2009.09.03

This is introducing a gene, it's a natural gene but it's not - it's a natural gene that's found in humans and is actually expressed all over your body in different levels, but you're concentrating it or over expressing it in one particular region of tissue in order to have a particular effect.

通过导入一个基因,这是一个天然基因但--,是一种于人体内发现的天然基因,在全身细胞中都有不同程度表达,但需要集中在组织的某一特定区域,表达或过表达,才能达到特定疗效

耶鲁公开课 - 生物医学工程探索课程节选

So what we are concentrating on here we will develop gold coming from the source rock and in Sierra Leone this is the first of its kind."

VOA: standard.2010.04.22

So up here, I've just predominantly been working and concentrating on my career, so.

在这里，我主要精力放在工作上，努力发展事业。

旧金山和洛杉矶的差异 - SpeakingMax英语口语达人

And it may not be easy, but change is coming." After criticism from Republicans and some Democrats that he was concentrating too much on health care reform and not enough on the economy, Mr.Obama has devoted many of his recent public statements to economic issues.

VOA: standard.2010.02.06