缓慢、拥挤且经常不太舒服的火车曾横跨这个幅员辽阔的国家，其较低的平均速度使得从上海到北京这样的旅程都是一种考验。
Slow, crowded and often uncomfortable trains ran across this vast country, with low average speeds making journeys such as Shanghai-Beijing a test of travel.
有研究表明，在道路上画上笔直的横杆，可以在开始将司机的平均速度降低一半。
Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half.
在科学家的实验室里，每个人分别在上午的两次访问中，以平均速度走了一个小时，理论上，他的身体应该主要依靠脂肪作为燃料。
On two separate morning visits to the scientists' lab, each man walked for an hour at an average speed that, in theory, should allow his body to rely mainly on fat for fuel.
如果河流在未来的平均速度加快，时钟就会比标准时间走得快。
If the rivers run faster in the future on average, the clock will get ahead of standard time.
我们的平均速度时80英里每小时。
因此平均速率,是4。,但是平均速度是。
So the average speed 5m/s is 4.5 meters per second, 0 but the average velocity is zero.
我们的平均速度是每小时50公里。
目前为止，是关于速率，平均速度和加速度。
All right, so far, about speeds and average velocities and accelerations.
我们定义平均速度，是四秒时的位置，减去0秒时的位置，除以。
We define average velocity as the position at time four seconds minus the position at time zero, 4 divided by four.
这个测试需要6到7分钟的最大出力，然后计算这个训练中的平均速度。
The test consists of exerting maximum effort for 6 to 7 minutes and calculating the average speed during this exercise.
两小时内她走8公里，那么她的平均速度就是每小时4公里。
She walked 8 km in two hours, so her average was 4 km per hour.
全球互联网的平均速度在经历过第二季度的不寻常下滑后又再一次提高了。
The global average connection speed is once again increasing, after an unusual drop in the second quarter.
平均速度的上升与发生碰撞事故的可能性以及碰撞后果的严重性直接相关。
An increase in average speed is directly related both to the likelihood of a crash occurring and to the severity of the consequences of the crash.
作者建议使用有效平均速度的概念来计算湍流的积分长度尺度。
It is suggested to use the concept of effective bulk velocity to calculate turbulence length integrate scale.
当然，我很同意你们的观点,但是这就是我们定义平均速度的方法。
Of course! I couldn't agree more with you but that's the way we define velocity.
再强调一次，不管我这个0点选在哪里，这个平均速度的值，都是不会改变的。
Again, if I had changed the zero points you would have found the same values for the average velocity.
消费品价格到三月下降了0.4%，这是自1955年来首次以平均速度下降。
Consumer prices dropped by 0.4% in the year to March, the first time they have fallen at an annual rate since 1955.
在项目中最精确的估算速度的方法是，进行几个迭代，然后看看平均速度是多少。
The single most accurate way to estimate velocity on a project is to run several iterations and then see what the average velocity was.
鸽子飞行数百英里，平均速度每分钟一英里，信息就放在小胶囊里绑在它们的腿上。
The pigeons flew hundreds of miles, averaging speeds of a mile a minute, with messages strapped to their legs in tiny capsules.
举例来说，如果我们谈到一个投手，就像松阪，我们想知道他投出，快球的平均速度。
For example, if we're talking about a pitcher, like Matsuzaka, we might want to know the speed of his average fastball.
所有的颗粒都降低了射流速度半宽，但对流向平均速度剖面的影响比较复杂。
All particles reduce the jet velocity half-width, but the effects on the streamwise mean velocity profiles are complicated.
现在，我认为,提出如下问题,是十分合理的：,比如说，平均速度是多少，在0到4秒之间？
Now, I would think that it is reasonable to ask the following question: What is the average velocity, for instance, between time zero and time four?
比如取t 4和，我这样连线，那角度就是负的，因此，t4和t5之间的平均速度5，为负。
T5 For instance, between t4 and t5, if I draw this line then this Angle here is negative 5 and so the average velocity between t4 and t5 is now negative.
把停车加油和交通堵塞而耽误的时间算在内，我们车的平均速度仍是每小时40英里。
Including stops for gas and traffic jams, our average speed was still 40 miles an hour.
结果显示，颗粒的流向平均速度剖面呈高斯分布，而横向平均速度剖面则呈正弦分布。
The results show that the streamwise mean velocity profile of particles takes on a Gauss distribution, and the lateral mean velocity profiles assumes a Sine distribution.
现在明白了吗，t时刻，的瞬时速度是怎样定义的，与两时刻间的平均速度相比，瞬时速度并不一样。
And now you will understand how we define the instantaneous velocity at time t which is different from an average velocity between two time intervals.
另一个有趣的统计是平均连接速度，韩国以15Mbps的速度遥遥领先，是全球平均速度的十倍。
Another interesting statistic is related to the average connection speed, South Korea being the front runner at 15 Mbps, 10 times the global average.
例如跟踪雷达天线的风力负载是由一个随时间变化的平均速度成分与迭加的随机阵风组成的。
The wind loading of a tracking radar antenna, for example, results from a mean velocity component that varies with time plus superimposed random gusts.
例如跟踪雷达天线的风力负载是由一个随时间变化的平均速度成分与迭加的随机阵风组成的。
The wind loading of a tracking radar antenna, for example, results from a mean velocity component that varies with time plus superimposed random gusts.
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