The team made the discovery by measuring the speed at which our galaxy is moving through space.

VOA: special.2009.01.20

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

So, since the speed of light equals lambda nu, we can say that momentum is equal to h divided by lambda.

所以，既然光速等于λ乘以υ,我们可以得到动量等于h除以λ

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

A clock tells you what time it is, but you can also say what time it is by seeing how fast the particle is moving because you know it started with some speed.

时钟能告诉你现在的时间,但你也可以通过测量质点速度,来判断当前的时间,因为你知道它的初速度

耶鲁公开课 - 基础物理课程节选

A special vibrating vest worn by the driver provides information about the vehicle's speed.

VOA: special.2009.11.03

Alright. So, since we have these terms defined, we know the frequency and the wavelength, it turns out we can also think about the speed of the wave, and specifically of a light wave, and speed and is just equal to the distance that's traveled divided by the time the elapsed.

好了，我们已经定义了，这些术语，我们知道了，频率和波长，现在可以来考虑,波的速度了，特别是光波的速度，速度等于它走过的距离,除以所用的时间，因为我们。

麻省理工公开课 - 化学原理课程节选

Two world records were set during the Vancouver Olympics, both in short track speed skating and both by China.

VOA: standard.2010.03.01

Skiing,speed skating, luge and bobsled are all Winter Olympics sports usually decided by fractions of a second.

VOA: standard.2010.02.15

With those results,he tied and then passed long track speed skater Bonnie Blair for the most Winter Olympics medals won by an American.

VOA: standard.2010.02.23

The Sea Shepherd Conservation Society says one of its boats,the Ady Gil, a sleek high-technology speed boat, was rammed and sliced in half by a Japanese ship,the Shonan Maru.

VOA: standard.2010.01.06

The picturesque town was a popular tourist destination, but the majority of its buildings were crushed by the onslaught of an unprecedented firestorm that advanced with such speed and ferocity and gave many residents little chance of survival.

VOA: standard.2009.03.21

Republicans also link potential costs with what they say is the failure so far of the American Recovery and Reinvestment Act the $787 billion stimulus plan approved by Congress to speed up economic recovery, an assertion the president and Democrats reject.

VOA: standard.2009.07.21