That was when he did twenty-seven thousand jumping jack exercises.

VOA: special.2011.05.16

All right. So jumping in to having established that, yes, particles have wave-like behavior, even though no, hey're not actually photons, we can't use that equation.

好的，我们已经承认了，粒子有波动性，虽然它们不是光子，我们不能用这个方程。

麻省理工公开课 - 化学原理课程节选

And the fact that we're always facing some risk of death recedes into the background in the way that most of us don't hear background noise-- that what jumping out of an airplane does for you is it spikes the risk of death.

我们一直面对的某些死亡的风险,这种情况下变成了背景声音,因为我们大部分人都听不到背景的噪声-,而跳下飞机带给你的,是死亡的风险上升。

耶鲁公开课 - 死亡课程节选

For example,African-American weddings may include "jumping the broom."

VOA: special.2010.08.09

But DeMong told VOA Sports that the first time he tried ski jumping, he had to conquer something every Nordic combined skier faces - fear.

VOA: standard.2010.01.31