Today we tell about a wave of crime taking place in the warm waters off the east coast of Africa.

VOA: special.2009.05.27

So I would choose something that have a wave lines off You wouldn't measure the dimension of a human hair with a yardstick, so I need something on this order.

所以我会选些东西,你将不会用一个码尺去量,人的头发有多大，所以我需要一些这个级数上的东西。

麻省理工公开课 - 固态化学导论课程节选

So again, if we think of a graph of the wave function, we had the wave function is at its highest amplitude when it's lined up with the nucleus, and then as we got further away from the nucleus, the amplitude of the wave function ends up tapering off until it never hits zero exactly, but it goes down very low.

同样，如果我们想象一幅波函数的图，波函数在原子核的位置上,有着最高的振幅，随着与原子核距离变远，波函数振幅逐渐变小直到,它永远不会到零，但它会变得很小。

麻省理工公开课 - 化学原理课程节选

The incident set off a wave of fear and anger across the country.

VOA: special.2010.05.06

The death of Habyarimana,a Hutu, set off a wave of violence against Rwanda's Tutsi minority.

VOA: standard.2009.04.10