This time,scientists hope to learn more about the formation, wind speed and shape of tornadoes.

VOA: special.2009.06.09

OK. Now. This is just sort of bringing us back up to speed and adding a few more details in.

好，现在，我们刚刚回头,过去看了一些,细节问题。

麻省理工公开课 - 计算机科学及编程导论课程节选

And the relationship that he put forth is that the momentum is equal to Planck's constant times nu divided by the speed of light, or it's often more useful for us to think about it in terms of wavelength.

爱因斯坦提出的关系式是,动量等于普朗克常数,乘以υ除以光速，或者用波长来表示,通常更容易让我们想明白。

麻省理工公开课 - 化学原理课程节选

The rise of these births may be linked to increased use of drugs to start or speed up labor and more births by Cesarean section.

VOA: special.2009.10.26

Speed of response, right, so I actually do tend to respond to some people's emails more quickly than others and that in fact might be a useful indicator.

回复的速度，是的，我可能对某些人的邮件,回复的速度更快一些,而事实上它可能是个有益的暗示。

哈佛公开课 - 计算机科学课程节选

It was flying more than five times the speed of sound.

VOA: special.2010.07.07

It means, when you are accelerating upwards, as the elevator picks up speed, the reading on the spring will be more and you will feel heavy.

也就是说当你向上做加速运动时,就像电梯加速的时候,弹簧的读数会增大,你会觉得自己变重了

耶鲁公开课 - 基础物理课程节选

The crew often added many more to increase the speed.

VOA: special.2009.12.23

That was more than seven times the speed of sound.

VOA: special.2010.07.07

But some Democratic lawmakers contend the long-term key to defeating the insurgency in Afghanistan is not to send more foreign troops, but to speed training of Afghan security forces.

VOA: standard.2009.10.25

"The key thing is an economically viable coalition more than one that is reached with great speed - something that is going to reassure the markets that the economic problems are really top of the agenda."

VOA: standard.2010.05.10