He says,as he did during his campaign for the White House, that he will take action against terror targets along the Pakistan-Afghanistan border.

VOA: standard.2009.03.29

You have discrete random variables, like the one I just defined, or there are also--which take on only a finite number of values-- and we have continuous random variables that can take on any number of values along a continuum.

就像刚定义的,是一个离散型随机变量,随机变量还可以有无限种取值,也就是连续型随机变量,随机变量可以取某一区间的一切值

耶鲁公开课 - 金融市场课程节选

Over the next two days, President Obama will take part in the summit's three plenary sessions, along with multilateral and bilateral meetings with fellow-leaders.

VOA: standard.2009.04.17