Now we will introduce what we call the average velocity.
下面我们引入，平均速度的概念。
And now we will look at the average velocity in a somewhat different way.
下面考虑下平均速度，方法就有些不同了。
The average velocity of droplet swarm is muchdiffrent from that of a single drop.
测试表明液滴群的浮升速度同单液滴有显著不同。
Notice that I haven't told you x It's completely unimportant for the average velocity.
这里请注意，我并没有说明,轴的原点在哪里。，where，I，choose，my，zero，on，my，x，axis。,因为它对平均速度而言,并不重要。
So the average speed 5m/s is 4.5 meters per second, 0 but the average velocity is zero.
因此平均速率,是4。,但是平均速度是。
Again, if I had changed the zero points you would have found the same values for the average 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。
The average velocity ratios are very steady, whatever in the long time scale or large spatial scale.
无论是从较长的时间尺度还是从较大的空间范围来看，平均波速比值都是非常稳定的。
Power factor is calculated using the actual bullet weight and the average velocity of the three rounds fired.
利用实际的弹头重量以及射击的三发平均枪口初速来计算威力系数。
Its maximum velocity is about 57% of the average velocity of the mainstream. Inertial effect is also studied in this paper.
最大回流速度可达主流平均速度57%左右此外，本文还研究了惯性效应。
The average velocity magnitude of the range nozzle increased with the increasing of inlet pressure but spreader nozzle would not.
喷头主、副喷嘴的平均湍动能随入口压力增大而增大，不受主喷嘴直径变化的影响。
The single most accurate way to estimate velocity on a project is to run several iterations and then see what the average velocity was.
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 influences of the maximum pressure, the average velocity and the slide - roll ratio on the yield thickness are discussed in detail.
本文还给出了用膜厚形式表示的屈服准则，并详细讨论了最大压力、平均速度和滑滚比对屈服膜厚的影响。
There is improvement as compared with the method of total flow which only gives the average velocity of transverse profile of open channel.
较总流量分析法，仅能给出明渠断面平均流速有所改进。
There is improvement as compared with the method of total flow, which only gives the average velocity of transverse profile of open channel.
较总流量分析法，仅能给出明渠断面平均流速有所改进。
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?
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？
The focus of the study lay in the relationship between the erosion and the average velocity, flow direction, the curvature of the elbow and so on.
重点研究了平均流速、流动方向、曲率半径和管道直径等对冲蚀的影响。
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.
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。
After optimization, the cutting Angle and the difference between the instantaneous velocity and the average velocity in the cutting area of the shear are decreased.
优化后，在剪切区，剪刃剪切倾角和连杆水平速度均匀性两项指标均有所提高。
If the Angle is positive — - I call this a positive Angle — then the average velocity is positive but if I have a negative Angle then the average velocity would be negative.
如果角度为正的话…，这是我选的正方向-，那么平均速度也为正，可是如果角度为负，则平均速度也自然为负。
The researchers also discovered that having the bird flap its wings slightly while being carried helped increase the average velocity of the robot roach by 12.7 percent.
研究人员还发现，有鸟儿拍打翅膀稍稍同时进行帮助12.7%提高机器人蟑螂的平均速度。
The results show that the average velocity of the shock wave attenuation in magnesium alloy is in good agreement with the propagation velocity of stress longitudinal wave;
研究结果表明：冲击波在镁合金中的平均传播速度与应力波中纵波的传播速度基本一致；
At the moment of step changing in velocity, the adjustment of lamellar spacing, the average velocity and the average interface undercooling characterize the hysteresis effect.
相对于阶跃时刻，片层间距调整、界面平均生长速率与平均过冷度的变化均具有滞后性。
The results are as follows: at low velocity, the heat transfer coefficient is nearly proportional to the average velocity and velocity and temperature gradient are in good synergy.
结果表明：当流速很低时，速度与换热系数几乎成线性变化，场的协同性很好；
The results indicate that the average velocity at inlet, discharge and output power of the turbine are higher when gravity is considered, but the efficiency is almost the same as that without gravity.
计算结果表明：考虑重力后，水轮机进口断面的平均速度、流量和功率都比不考虑重力时大，但效率相差不大。
On average, a given team will tend to complete the same number of points' worth of work each iteration; this number is the team's velocity.
一般来看，稳定的团队会在每个迭代中完成固定点数的故事；这个点数就是团队的速度。
So the signs in the velocity and the signs in average acceleration depend crucially on how I have defined my increasing value of x not where I choose my zero points.
所以速度的符号,和平均加速度的符号,这二者都取决于,这里x正方向,是如何定义的,和0点的选取没有关系。
We define average velocity as the position at time four seconds minus the position at time zero, 4 divided by four.
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。
The average acceleration 2 between time t1 and time t2 2 would then be the velocity at time t2 minus the velocity at time t1, divided by t2 minus t1.
在t1和t2之间的，这段平均加速度2，等于t2时刻的速度2，减去t 1时速度，再除以。
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.
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。
However, if you take the average acceleration t1 0 that is smaller than zero 0 because here the velocity is zero but here the velocity is negative.
可是如果考虑到,和t5之间的平均加速度5，between，t1，and，t5,那么它将小于,因为这里速度为,但是到了这里却是负值。
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