He told a rally this past weekend that no pressure can prevent the military from playing its role in Guinea's future.

VOA: standard.2009.08.25

What...even if there was no single event, what would you say happened... what was the role of government ? for example, in the sudden growth?

即便没有什么转折性大事件，您觉得是什么原因。,比如说在这次经济腾飞中,印度政府扮演了什么样的角色？

普林斯顿公开课 - 国际座谈会课程节选

- And now Christiana if you would -- your goal -- your role here -- no, let's see.

现在Christiana，如果你想要--你的目的-,你的角色--不，让我们看看。

哈佛公开课 - 计算机科学课程节选

It continues to confirm that some U.S.bombers, all the B-1 bombers, no longer have a nuclear weapons role,".

VOA: standard.2009.04.08

I expect that if I add -A to A, I should get the guy who plays the role of 0 in this world, which is the vector of no length.

我希望如果用 -A 加上 A,应该得到一个零矢量,也就是一个没有模长的矢量

耶鲁公开课 - 基础物理课程节选

The 81-year-old king of Thailand has no formal political role but has been a unifying force in Thailand during periods of political uncertainty.

VOA: standard.2009.10.15