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

Super-fast Internet connections let people watch movies and send huge amounts of information at the speed of light.

VOA: special.2010.09.01

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

Tornadoes usually travel in a northeasterly direction with a speed of thirty-two to sixty-four kilometers an hour.

VOA: special.2010.05.11

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

VOA: special.2010.03.22

In June,the Speed Sisters became the first all-female racing team to compete in the Speed Test, a popular race in the West Bank.

VOA: special.2010.07.30

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

The American buffalo could run at the speed of almost seventy-five kilometers an hour.

VOA: special.2009.02.15

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

They ride high-speed elevators that go deep inside the dam.

VOA: special.2009.08.12

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

VOA: special.2010.05.21

His speed was twenty-eight thousand kilometers an hour.

VOA: special.2009.06.17

Its speed was twenty-nine thousand kilometers an hour.

VOA: special.2009.07.15