"What you've got here is a legal issue and a political issue and both of those are very much in play at the present time,".

VOA: standard.2010.01.30

This is the present value of $1 in one time period, which I'm taking to be a year.

这就是一美元在一段时期内的现值,我只是将一美元持有一年

耶鲁公开课 - 金融市场课程节选

Others last for months or even years. There is no clear way of predicting at the present time how long this activity might go on for."

VOA: standard.2010.04.16