"We can't celebrate a 10 percent unemployment rate, especially the long-term unemployment continues to grow in very troubling numbers,"

VOA: standard.2009.12.05

This is the starting speed, that's the rate at which it is gaining velocity, and that's how long it's been gaining it.

这是起始时的速度,这是速度的增长速率,这是加速的时间

耶鲁公开课 - 基础物理课程节选

Okay.So that's all you got to do, and you can hear the holding for twice as long as the other, so you got irregular rate of harmonic change.

好的，现在需要大家做的都弄好了，而且大家可以听到比别的要长两倍，这就是泛音的不规则变化率。

耶鲁公开课 - 聆听音乐课程节选