Rosa is from a country where high school is five years, not four like in America.

VOA: special.2009.11.05

If the average age of death was something like forty-five, maybe a fifty-fifty chance of--high risk-- of one of the parents dying.

那么这个概率其实很低,不是吗,大概有高达50%的可能性,双亲中的一人会死去

耶鲁公开课 - 金融市场课程节选

If the average age of death was something like forty-five, maybe a fifty-fifty chance of--high risk-- of one of the parents dying.

那么这个概率其实很低,不是吗,大概有高达50%的可能性,双亲中的一人会死去

耶鲁公开课 - 金融市场课程节选