In experimenting we find out that sound travels with different velocities through different substances.
在实验中，我们发现声音以不同的速度通过不同的物质而传播。
By compiling a map of seismic velocities from thousands of earthquakes across the globe, they can also begin to map temperatures and densities throughout the mantle.
通过编制全球数千次地震的地震速度图，他们还可以开始绘制地幔的温度和密度图。
We will discuss velocities and acceleration.
这节课主要讨论速度和加速度。
The velocities reverse directions, but the speeds remain the same.
,速度改变了方向，但它的大小不变。
Now, the velocities after the collisions, by convention, are primed.
碰撞后的速度，依惯例，是有撇号的。
This procedure does not affect the theoretical velocities.
这样处理并不影响理论速度。
All right, so far, about speeds and average velocities and accelerations.
目前为止，是关于速率，平均速度和加速度。
At high gas velocities the circulation of solids becomes appreciable.
在高气速时，固体颗粒循环变得显著了。
We measured the plasma expansion velocities by the electrical methods.
我们采用电学方法进行了等离子体膨胀速度测量。
Assures perfect alignment of disc and seat even at large flow velocities.
即使在大流速下，也能够确保阀瓣和阀座的精确对准。
Yet Rubin's observations found no drop-off at all in the stars' velocities further out in a galaxy.
然而鲁宾的观测结果则表明，远离星系中心的全部星体的速率都没有降低。
If we sum up individual velocities all developers will it help us to create a better iteration plan?
如果我们把团队的全部个人开发速率累加在一起，是不是可以帮我们制定更好的迭代计划呢？
In the early 1970s, Vera Rubin made observations of the velocities of stars that imply dark matter exists.
早在1970年代初，Vera Rubin对星系旋转速度的观测暗示了暗物质的存在。
By using telescopes in Chile, the astronomers measured Doppler shifts and thus velocities of gas in the Trifid.
利用智利的天文望远镜，天文学家测量了三裂星云中气体的多普勒频移和速度。
The basic distribution laws of the tangential and axial velocities of compound hydrocyclones are obtained.
给出了复合式水力旋流器切向速度和轴向速度的基本分布规律。
Whenever it is necessary to restart the simulation run, an appropriate set of positions and velocities can be reloaded.
在需要重新启动模拟时，可以加载一组合适的位置和速度。
The launching technique to enhance the projectile velocities of a two-stage light gas gun was studied in this paper.
本文研究了提高二级轻气炮弹丸速度的发射技术途径。
If the distant galaxies have different peculiar velocities than the nearby galaxies, the researchers' results would be skewed.
如果遥远星系的异常速度和近处的不一样，那么他们的结果就将是有偏差的。
Such amplitude variations would be predicted on the basis of principles governing seismic velocities in heterogeneous media.
按照在非均匀介质内确定地震速度的原理，应能预测这样的振幅变化。
Act returns a pair of velocities - translational and rotational (in that order) - that show the action it wants the motor to take.
act返回两个速度(依次为平移速度和旋转速度)，表示希望发动机执行的动作。
The longitudinal grooves seen in the foreground are thought to be due to differential shear and lateral spreading at high velocities.
在前景突出部分看到的纵向沟纹，被认为是由剪断层(differentialshear)以及高速的横向扩散所造成的。
At each time step, we calculate the forces on each atom, then we update the velocities and the positions according to Newton's second law.
在每个步骤中，我们计算每个原子受到的作用力，然后根据牛顿第二法则更新速度和位置。
Drivers go into the turn downhill and to the left before, moments later, turning it around to go uphill and to the right, often at insane velocities.
赛车先是经历一个下坡左转，过一会儿，又一个上坡右转，而且往往是在高速行驶途中。
And these additional velocities that galaxies have that aren't due to the expansion of the universe are due to the uneven distribution of matter in the universe.
而这些星系的额外的速度，不是由于宇宙的膨胀，而是由于物质在宇宙中的分布不均匀。具体地说，我们的银河系正被附近的仙女座星系和室女座星系团拉扯着。
It should consider the influences of these factors when analyzing elastic wave velocities either in laboratory condition or in practical seismic exploration.
因此不论在实验室条件下，或是在实际地震勘探中分析弹性波速度时，应考虑这些因素影响。
This paper gives a method to evaluate the quality of the impedance-matching experiments by the relation between standard and unknown materials shock wave velocities.
介绍了用标准材料与待测材料的冲击波速度的关系评价阻抗匹配实验质量的一种方法。
This paper gives a method to evaluate the quality of the impedance-matching experiments by the relation between standard and unknown materials shock wave velocities.
介绍了用标准材料与待测材料的冲击波速度的关系评价阻抗匹配实验质量的一种方法。
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