"In addition to cleaning up the mess, repairing the damage and cracking down on big oil companies, we also have to get serious about ending our dependence on oil and creating new sources of clean energy."

VOA: standard.2010.07.31

And it turned out that another, not quite as deadly, but still very serious disease called syphilis was also common in this part of the world at that time.

现在已知另外一种疾病,它并不完全致命但也很严重,它叫梅毒,在那时的一些地方也很常见

耶鲁公开课 - 生物医学工程探索课程节选

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

"I think that there will be a refocusing of how the UK can operate within Pakistan and Afghanistan, but also there will be some serious questions about whether or not the UK can maintain this expeditionary role" TV debates, a first in British politics, have thrust the outsider Nick Clegg of the Liberal Democrats into the role of kingmaker in a close election.

VOA: standard.2010.04.30