The findings suggest that even a half-hour walk at a quick speed every day could lower the risk of cognitive impairment.

VOA: special.2011.07.27

- Part of the challenge is speed, too, how quickly you can get these answers in terms of getting them in on time.

部分困难也会来自于速度，你多快能做出答案,能否在规定的时间做完。

麻省理工公开课 - 化学原理课程节选

The beat will do--control--that, so it's the pace or speed of the beat.

节拍才是根本,所以速度指节拍的快慢

耶鲁公开课 - 聆听音乐课程节选

But to a new generation of high-speed communicators, a tweet describes a message sent through a popular new service.

VOA: special.2009.02.06

If you want to find the speed there, you put the equation v^=v0^-2g.

如果你想求出那一点的速度,可利用方程v^=v0^-2g

耶鲁公开课 - 基础物理课程节选

He says a new system is needed to meet the speed and complexity of a twenty-first century global economy.

VOA: special.2009.06.19

So, we can just plug it in. Speed is equal to the distance traveled, which is lambda over the time elapsed, which is 1 over nu. so, we can re-write that as speed is equal to lambda nu times nu, and it turns out typically this is reported in meters per second or nanometers per second.

经过的距离和所花的时间,我们把它们带进来,速度等于经过的距离,也即是lambda除以,所花的时间,通常它的单位,是米每秒或者纳米每秒。

麻省理工公开课 - 化学原理课程节选

But in the western United States, there are highways where the speed limit is one hundred twenty-five kilometers an hour.

VOA: special.2010.04.26

It's the pace or speed of the-- Piece.

是什么的进行速度呢,一段乐曲

耶鲁公开课 - 聆听音乐课程节选

A newly released proposal calls for almost everyone in the United States to have high-speed Internet service at home within ten years.

VOA: special.2010.03.19

The first plane ever to fly faster than the speed of sound was the X-1 in nineteen forty-seven.

VOA: special.2010.07.07

They said the overall strength of storms measured by wind speed might increase two to eleven percent by the year twenty-one hundred.

VOA: special.2010.08.24

You can take a high-speed boat trip for about an hour to the Dry Tortugas National Park.

VOA: special.2010.03.22

The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along.

VOA: special.2011.06.07

Earlier in the week, the head of the World Bank said international support can speed progress -- "but only if coupled with real reform."

VOA: special.2011.05.27

Scientists use the Saffir-Simpson Hurricane Scale to measure the intensity of storms based on wind speed.

VOA: special.2010.08.24

The plunge renewed debate about the risks of electronic exchanges and high-speed computer trading systems.

VOA: special.2010.05.14

These products have names like Red Bull, Monster,Ripped Force, Speed Stack and 5-Hour Energy.

VOA: special.2009.07.22

That is just under the wind-speed of a hurricane,a very severe ocean storm.

VOA: special.2010.10.19

Physicists use super-powerful magnets to speed particles and control radiation like X-rays.

VOA: special.2010.10.08

It would reach hypersonic speeds -- five times the speed of sound.

VOA: special.2010.07.07

The X-15 set height and speed records greater than those expected.

VOA: special.2010.07.07

The F.C.C.currently defines high-speed Internet as an information service.

VOA: special.2010.05.21

"It includes three hundred million dollars to buy new cars for the government, eight billion dollars for high-speed rail projects, such as a 'magnetic levitation' line from Las Vegas to Disneyland, and one hundred forty million dollars for something called 'volcano monitoring.'

VOA: special.2009.02.27

One of them is Dixie Baver, mother of speed skater Allison Baver, a three-time Olympian from the eastern state of Pennsylvania.

VOA: standard.2010.02.20

There are only minutes - sometimes seconds - to react, and the incoming weapons are traveling faster than the speed of sound.

VOA: standard.2010.03.26

A high-speed French train can reach 574 kilometers per hour, but the record was set a Japanese train with a speed of 581 kilometers per hour.

VOA: standard.2010.02.15

In Europe and Asia they are dedicated tracks where only high-speed trains operate on.

VOA: standard.2010.02.15

The Lisbon Treaty is intended to speed up decision-making in the EU.

VOA: standard.2009.10.02

Eighty billion dollars of that total was to be pumped into the U.S.economy to promote development of renewable energy, urban mass transit, high-speed rail systems and clean energy jobs.

VOA: standard.2010.02.25