These populations, they have no political voice - neither at national or international levels."

VOA: standard.2010.04.05

But you notice up here how close these levels are, so we are looking at very, very fine distinctions.

你能看到这些层有多接近，所以我们是在观察非常非常细微的差别。

麻省理工公开课 - 固态化学导论课程节选

You could interfere at these later levels as well, for example, by augmenting RNA degradation.

你也能干扰一些下游的调控水平,例如,通过增强RNA的降解

耶鲁公开课 - 生物医学工程探索课程节选

The number of these attacks and the resulting casualties remained at the 2004 levels though, and as of yet have not rekindled a cycle of ethno-sectarian type violence,".

VOA: standard.2009.03.31

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

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

VOA: standard.2010.02.15