The researchers compared cotinine levels to behavioral problems that parents observed in the children during a 2-week period.

VOA: special.2009.01.13

But this is where for lack of a better term non-western countries really formally challenged at the highest levels and the lowest, too.

之所以这么说，是因为找不到更好的表达方式了,这表明非西方国家,从最高层面和最低层面都提出了挑战。

普林斯顿公开课 - 人性课程节选

That rate of rise is steeper so they--antibody levels go up more rapidly and they reach a higher level.

同时,上升速度也更加迅速,以达到更高的浓度水平

耶鲁公开课 - 生物医学工程探索课程节选

but co-star Cillian Murphy in a telephone interview says he believes it can be enjoyed on many levels.

VOA: standard.2010.07.16

Not lower high expectations-- that won't make a difference to our levels of wellbeing.

而不是低的和高的期望-,那不会影响我们的幸福水平。

哈佛公开课 - 幸福课课程节选

Indian Kashmir has been wracked by a two-decade-long separatist insurgency, although levels of violence have sharply dropped in the lpast five years.

VOA: standard.2009.10.28

And we can look at precisely why that is by looking at the equations for the energy levels for a hydrogen atom versus the multi-electron atom. So, for a hydrogen atom, and actually for any one electron atom at all, this is our energy or our binding energy.

而且我们可以精确地看看,为什么是这样的,通过看对于氢原子和,多电子原子能级的方程所以对于氢原子，事实上对于任何一个电子，这是我们的能量或者我们的结合能。

麻省理工公开课 - 化学原理课程节选

So in other words, if you live with a smoker, you really are at very high risk of demonstrating high levels of second-hand smoke exposure."

VOA: standard.2010.06.15

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

Numerous studies indicate African-Americans and Hispanics receive a poorer quality of health care than non-Hispanic whites, even when they have the same levels of income and health insurance coverage.

VOA: standard.2010.03.05

A child's weight and levels of C-reactive protein are strongly related,"

VOA: standard.2010.03.09

That is our basic challenge now,". Geithner says it will take some time to bring down unemployment levels, which in October reached a 26-year high in the United States.

VOA: standard.2009.11.12

So working with the government of Morocco,we are hoping to really help to see blossom a lot more economic activity at the lower levels that will then from the bottom-up build prosperity,"

VOA: standard.2009.11.03

Failure to maintain tight control of glucose levels - by measuring blood sugar with a meter and compensating with doses of insulin - can result in serious health complications, including blindness, kidney failure and heart disease.

VOA: standard.2010.04.15

He says increased demand for the fish could solve two problems - getting paid to fish a nuisance out of the river, and returning the populations of native fish to normal levels not seen in several decades.

VOA: standard.2010.07.19