And again, Americans all around the country took note of this quiet,serious man who did such effective work in so many different kinds of situations.

VOA: special.2011.02.10

But there's also some very serious implications of this kind of work.

但是这类研究也有些严肃的暗示意义。

耶鲁公开课 - 心理学导论课程节选

So, although we joke about these kinds of experiments, and they are fun to talk about because they are unusual and cute, there is also some serious implications of this kind of work that one might think about.

尽管我们觉得这些实验十分好笑，说起来也有趣,因为它们不同寻常，而且可爱，但实际上是由深刻含义的,我们可以思考一下这类研究的含义。

耶鲁公开课 - 心理学导论课程节选

"One should work on this and stop sleeping." Russia has also suffered a serious brain drain since 1991, the report says.

VOA: standard.2010.02.03

She says the raid demonstrates the commitment of law enforcement and the serious investigative work done to find the perpetrators of the bombing and dismantle their terror network.

VOA: standard.2009.09.17

But these are things that can be minimized and lessened if Mexico and the United States work together, identify the most serious problems and try to fight them in very focused ways."

VOA: standard.2009.12.18

Even if U.S.economic output expands in 2010 and more Americans head back to work, both critics and supporters of the president say the nation faces a more serious challenge to future economic viability: a rapidly growing deficit and a national debt estimated at more than $12 trillion.

VOA: standard.2010.01.15