"Actually,each fat cell secretes at least 100 chemicals out of the cell into our bodies, which promote cancer, which promote aging, which promote inflammatory chemicals that can influence dementia, arthritis and heart disease.

VOA: standard.2010.02.23

But when we build our military, when we promote democracy, when we operate in internationa institutions, when we try to persuade other nations to do what we want.

但当我们壮大军事力量时，当我们宣扬民主，当我们在国际机构处理事务时，当我们试图说服其他国家,听从我们时。

普林斯顿公开课 - 国际座谈会课程节选

So if we take our carbon atom here, which has two electrons in the 2 s orbital, and we promote one of these electrons into a 2 p orbital, what we see now is that yes, we do, we have four unpaired electrons.

这是碳原子，2s轨道里有两个电子，我们把一个电子激发到2p轨道里，我们看到现在，是的，我们有4个未配对电子。

麻省理工公开课 - 化学原理课程节选

"And every time I ask myself,as I do, these questions my answer is yes, we are taking the right action, the action that is necessary to safeguard both our country and promote security in the world,"

VOA: standard.2009.09.04