"But when you look at America, you know,we're trying to make a comeback and really show that we are part of a global community.

VOA: standard.2009.10.02

They divide by n-1 to make it an unbiased estimator of the population variance, but I'm just going to show it in a simple way here.

当除以n-1表示的是对总体的,无偏估计,我在这里只是说的简单一点

耶鲁公开课 - 金融市场课程节选

is the U.S.going to show more trust towards the Muslim people in terms of the choices that they may make in a democratic process?"

VOA: standard.2010.05.11