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。
CHAPTER I. VELOCITIES OF THE FORCES OF NATURE.
第1章自然力的速度。
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。
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。
Relativity is useful in its domain of velocities near the speed of light.
相对论是在其速度接近光速的速度域有用。
When we deal with collisions, the velocities of the objects before the collision are unprimed.
当处理碰撞问题，物体的速度，在碰撞前无撇号。
"About 5% of the stars had very peculiar velocities," Olsen says. "We were definitely surprised.
“大约5%的恒星有着异常的速度，”奥尔森说，“我们大为吃惊，我根本没有料到会有这样的情况。”
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。
This results in the rotors being rotated at different velocities, which can be used to control yaw.
这样的结果是转子正处于不同的速度旋转，可用于控制偏航。
By using cyclone separators to return the entrained solids, even higher gas velocities can be used.
当采用丁旋风分离器来使夹带固体颗粒返回时，还可用更高的气速。
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。
So to get into the center-of-mass frame, you must subtract the velocity of the center of mass from the initial velocities.
要进入重心体系，你就必须减去速度，重心的速度，从原始速度中减去。
This phenomenon gives the illusion that material is streaming off the star as velocities faster than the speed of light.
这一现象不禁使人们误认为当速度大于光速时物质从星体里涌流出来。
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。
As a whole, the groups with BRGs tended to have more galaxies which were more luminous, and had a greater variety of velocities.
总的来说，含有BRG的星系群倾向于含有更多的明亮星系，在周转速度上的差异也更大。
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。
If the stars and gas that we can see inside galaxies are only a small portion of their total mass, then the velocities make sense.
假设我们在星系中看到的星球和气体只占了星系总体积的一小部分，那么像这样的速率就说得通了。
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。
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。
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