The group says less time passes for an earthquake shock wave to reach a measuring instrument than in the past.

VOA: special.2009.03.17

The interest rate has units of time, so I have to specify a time period over which I'm measuring an interest rate.

不同时间段有不同的利率,因此我必须在不同的时间段,细化不同的利率

耶鲁公开课 - 金融市场课程节选